diff --git a/.dockerignore b/.dockerignore
index 510536d7..1db22cbb 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,4 +1,5 @@
 data
 examples
 k8s-examples
-.idea
\ No newline at end of file
+.idea
+.git
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index de0a3113..d443bb68 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,8 +24,8 @@ HEALTHCHECK --start-period=1m CMD mc-monitor status --host localhost --port $SER
 
 RUN addgroup --gid 1000 minecraft \
   && adduser --system --shell /bin/false --uid 1000 --ingroup minecraft --home /home/minecraft minecraft \
-  && mkdir -m 777 /data /mods /config /plugins \
-  && chown minecraft:minecraft /data /config /mods /plugins /home/minecraft
+  && mkdir -m 777 /data \
+  && chown minecraft:minecraft /data /home/minecraft
 
 EXPOSE 25565 25575
 
@@ -52,7 +52,7 @@ RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
  --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
- --var version=1.3.5 --var app=mc-server-runner --file {{.app}} \
+ --var version=1.4.2 --var app=mc-server-runner --file {{.app}} \
  --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
@@ -72,8 +72,7 @@ ENV UID=1000 GID=1000 \
   JVM_XX_OPTS="-XX:+UseG1GC" MEMORY="1G" \
   TYPE=VANILLA VERSION=LATEST FORGEVERSION=RECOMMENDED SPONGEBRANCH=STABLE SPONGEVERSION= FABRICVERSION=LATEST LEVEL=world \
   PVP=true DIFFICULTY=easy ENABLE_RCON=true RCON_PORT=25575 RCON_PASSWORD=minecraft \
-  RESOURCE_PACK= RESOURCE_PACK_SHA1= \
-  LEVEL_TYPE=DEFAULT GENERATOR_SETTINGS= WORLD= MODPACK= MODS= SERVER_PORT=25565 ONLINE_MODE=TRUE CONSOLE=true SERVER_NAME="Dedicated Server" \
+  LEVEL_TYPE=DEFAULT SERVER_PORT=25565 ONLINE_MODE=TRUE SERVER_NAME="Dedicated Server" \
   REPLACE_ENV_VARIABLES="FALSE" ENV_VARIABLE_PREFIX="CFG_"
 
 COPY start* /
diff --git a/README.md b/README.md
index 25459e12..4fdf5077 100644
--- a/README.md
+++ b/README.md
@@ -145,8 +145,8 @@ Keep in mind that some versions of Minecraft server can't work on the newest ver
 
 ## Healthcheck
 
-This image contains [Dinnerbone's mcstatus](https://github.com/Dinnerbone/mcstatus) and uses
-its `ping` command to continually check on the container's. That can be observed
+This image contains [mc-monitor](https://github.com/itzg/mc-monitor) and uses
+its `status` command to continually check on the container's. That can be observed
 from the `STATUS` column of `docker ps`
 
 ```
@@ -161,16 +161,6 @@ You can also query the container's health in a script friendly way:
 healthy
 ```
 
-Finally, since `mcstatus` is on the `PATH` you can exec into the container
-and use mcstatus directly and invoke any of its other commands:
-
-```
-> docker exec mc mcstatus localhost status
-version: v1.12 (protocol 335)
-description: "{u'text': u'A Minecraft Server Powered by Docker'}"
-players: 0/20 No players online
-```
-
 ## Deployment Templates and Examples
 
 ### Helm Charts
@@ -997,6 +987,12 @@ Allows users to use flight on your server while in Survival mode, if they have a
 
     -e ALLOW_FLIGHT=TRUE|FALSE
 
+### Other server property mappings:
+
+Environment Variable | Server Property
+---------------------|-----------------
+PLAYER_IDLE_TIMEOUT  | player-idle-timeout
+
 ## Miscellaneous Options
 
 ### Running as alternate user/group ID
@@ -1042,10 +1038,16 @@ To enable remote JMX, such as for profiling with VisualVM or JMC, add the enviro
 
 ### Enable Aikar's Flags
 
-[Aikar has does some research](https://aikar.co/2018/07/02/tuning-the-jvm-g1gc-garbage-collector-flags-for-minecraft/) into finding the optimal JVM flags for GC tuning, which becomes more important as more users are connected concurrently. The set of flags documented there can be added using
+[Aikar has does some research](https://mcflags.emc.gs/) into finding the optimal JVM flags for GC tuning, which becomes more important as more users are connected concurrently. The set of flags documented there can be added using
 
     -e USE_AIKAR_FLAGS=true
 
+When `MEMORY` is greater than or equal to 12G, then the Aikar flags will be adjusted according to the article.
+
+Large page support can also be enabled by adding
+
+    -e USE_LARGE_PAGES=true
+
 ### HTTP Proxy
 
 You may configure the use of an HTTP/HTTPS proxy by passing the proxy's URL via the `PROXY`
diff --git a/examples/docker-compose-curseinstance.yml b/examples/docker-compose-curseinstance.yml
new file mode 100644
index 00000000..c1d62f7f
--- /dev/null
+++ b/examples/docker-compose-curseinstance.yml
@@ -0,0 +1,20 @@
+version: "3.7"
+
+services:
+  mc:
+    image: itzg/minecraft-server
+    ports:
+      - 25565:25565
+    volumes:
+      # Attach .../Curse/Minecraft/Instances for use at /instances
+      - ./Instances:/instances:ro
+      # Attach /data as usual
+      - ./ServerData:/data
+    environment:
+      EULA: "TRUE"
+      # Modpacks generally need more memory, so let's give at 2 GB
+      MEMORY: 2G
+      # Use new CURSE_INSTANCE type
+      TYPE: CURSE_INSTANCE
+      # Reference directory of or full path to minecraftinstance.json
+      CURSE_INSTANCE_JSON: /instances/FTB Presents SkyFactory 3
diff --git a/mcstatus b/mcstatus
index 89c62d78..e7e314b8 100755
--- a/mcstatus
+++ b/mcstatus
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+echo "WARNING: mcstatus is deprecated; calling mc-monitor instead"
+
 ##### mcstatus shim for mc-monitor
 # handles translating calls to
 #   mcstatus (host:port) (command)
diff --git a/start-configuration b/start-configuration
index aa014998..a79f7471 100644
--- a/start-configuration
+++ b/start-configuration
@@ -19,9 +19,9 @@ if [ ! -e /data/eula.txt ]; then
     exit 1
   fi
 
-  echo "# Generated via Docker on $(date)" > eula.txt
-  echo "eula=$EULA" >> eula.txt
-  if [ $? != 0 ]; then
+  echo "# Generated via Docker on $(date)" > /data/eula.txt
+
+  if ! echo "eula=$EULA" >> /data/eula.txt; then
     log "ERROR: unable to write eula to /data. Please make sure attached directory is writable by uid=${UID}"
     exit 2
   fi
@@ -49,56 +49,61 @@ export VERSIONS_JSON=https://launchermeta.mojang.com/mc/game/version_manifest.js
 
 case "X$VERSION" in
   X|XLATEST|Xlatest)
-    export VANILLA_VERSION=`curl -fsSL $VERSIONS_JSON | jq -r '.latest.release'`
+    VANILLA_VERSION=$(curl -fsSL $VERSIONS_JSON | jq -r '.latest.release')
   ;;
   XSNAPSHOT|Xsnapshot)
-    export VANILLA_VERSION=`curl -fsSL $VERSIONS_JSON | jq -r '.latest.snapshot'`
+    VANILLA_VERSION=$(curl -fsSL $VERSIONS_JSON | jq -r '.latest.snapshot')
   ;;
   X[1-9]*)
-    export VANILLA_VERSION=$VERSION
+    VANILLA_VERSION=$VERSION
   ;;
   *)
-    export VANILLA_VERSION=`curl -fsSL $VERSIONS_JSON | jq -r '.latest.release'`
+    VANILLA_VERSION=$(curl -fsSL $VERSIONS_JSON | jq -r '.latest.release')
   ;;
 esac
+export VANILLA_VERSION
 log "Resolved version given ${VERSION} into ${VANILLA_VERSION}"
 
-cd /data
+cd /data || exit 1
 
 export ORIGINAL_TYPE=${TYPE^^}
 
 log "Resolving type given ${TYPE}"
 case "${TYPE^^}" in
   *BUKKIT|SPIGOT)
-    exec /start-deployBukkitSpigot $@
+    exec /start-deployBukkitSpigot "$@"
   ;;
 
   PAPER)
-    exec /start-deployPaper $@
+    exec /start-deployPaper "$@"
   ;;
 
   FORGE)
-    exec /start-deployForge $@
+    exec /start-deployForge "$@"
   ;;
 
   FABRIC)
-    exec /start-deployFabric $@
+    exec /start-deployFabric "$@"
   ;;
 
   FTB|CURSEFORGE)
-    exec /start-deployFTB $@
+    exec /start-deployFTB "$@"
   ;;
 
   VANILLA)
-    exec /start-deployVanilla $@
+    exec /start-deployVanilla "$@"
   ;;
 
   SPONGEVANILLA)
-    exec /start-deploySpongeVanilla $@
+    exec /start-deploySpongeVanilla "$@"
   ;;
 
   CUSTOM)
-    exec /start-deployCustom $@
+    exec /start-deployCustom "$@"
+  ;;
+
+  CURSE_INSTANCE)
+    exec /start-validateCurseInstance "$@"
   ;;
 
   *)
diff --git a/start-deployFabric b/start-deployFabric
index 194594a9..d8305568 100644
--- a/start-deployFabric
+++ b/start-deployFabric
@@ -29,7 +29,7 @@ elif [[ ! -e $FABRIC_INSTALLER ]]; then
   exit 2
 fi
 
-installMarker=".fabric-installed-${VANILLA_VERSION}-${FABRIC_VERSION:-manual}"
+installMarker="/data/.fabric-installed-${VANILLA_VERSION}-${FABRIC_VERSION:-manual}"
 
 debug Checking for installMarker ${installMarker}
 if [[ ! -e $installMarker ]]; then
diff --git a/start-deployForge b/start-deployForge
index d280ac5e..739808b0 100644
--- a/start-deployForge
+++ b/start-deployForge
@@ -47,7 +47,7 @@ elif [[ ! -e $FORGE_INSTALLER ]]; then
   exit 2
 fi
 
-installMarker=".forge-installed-$shortForgeVersion"
+installMarker="/data/.forge-installed-$shortForgeVersion"
 
 if [ ! -e $installMarker ]; then
   if [ ! -e $FORGE_INSTALLER ]; then
diff --git a/start-finalSetup02Modpack b/start-finalSetup02Modpack
index 751f0ce0..bdd0b40b 100644
--- a/start-finalSetup02Modpack
+++ b/start-finalSetup02Modpack
@@ -133,9 +133,22 @@ if [[ "${GENERIC_PACK}" ]]; then
     base_dir=/tmp/generic_pack_base
     mkdir -p ${base_dir}
     unzip -q -d ${base_dir} ${GENERIC_PACK}
-    depth=$(( ${GENERIC_PACK_STRIP_DIRS:-1} + 1 ))
-    log "Applying generic pack, stripping $(( depth - 1 )) level ..."
-    find ${base_dir} -type d -mindepth $depth -maxdepth $depth -exec cp -r {} /data/ +
+    if [ -f /data/manifest.txt ]; then
+      log "Manifest exists from older generic pack, cleaning up ..."
+      while read f; do
+        rm -rf "/data/${f}"
+      done < /data/manifest.txt
+      find /data/* -type d -exec rmdir --ignore-fail-on-non-empty {} +
+      rm -f /data/manifest.txt
+    fi
+    log "Writing generic pack manifest ... "
+    find ${base_dir} -type f -print0 | xargs -0 -I {} echo "{}" | sed "s#${base_dir}/##" > /data/manifest.txt
+    log "Applying generic pack ..."
+    IFS='
+'
+    set -f
+    for d in $(find ${base_dir} -type d); do mkdir -p "$(sed "s#${base_dir}#/data#" <<< $d)"; done
+    for f in $(find ${base_dir} -type f); do cp -f "$f" "$(sed "s#${base_dir}#/data#" <<< $f)"; done
     rm -rf ${base_dir}
     sha256sum ${GENERIC_PACK} > ${sum_file}
   fi
diff --git a/start-finalSetup04ServerProperties b/start-finalSetup04ServerProperties
index 91919a79..d5ef5503 100644
--- a/start-finalSetup04ServerProperties
+++ b/start-finalSetup04ServerProperties
@@ -76,6 +76,7 @@ function customizeServerProps {
   setServerProp "level-type" "${LEVEL_TYPE^^}"
   setServerProp "resource-pack" "$RESOURCE_PACK"
   setServerProp "resource-pack-sha1" "$RESOURCE_PACK_SHA1"
+  setServerProp "player-idle-timeout" "$PLAYER_IDLE_TIMEOUT"
 
   if [ -n "$DIFFICULTY" ]; then
     case $DIFFICULTY in
diff --git a/start-minecraftFinalSetup b/start-minecraftFinalSetup
index be80eeee..ff20ceea 100644
--- a/start-minecraftFinalSetup
+++ b/start-minecraftFinalSetup
@@ -4,14 +4,14 @@
 
 if [ -n "$OPS" ]; then
   log "Setting/adding ops"
-  rm -rf ops.txt.converted
-  echo $OPS | awk -v RS=, '{print}' > ops.txt
+  rm -rf /data/ops.txt.converted
+  echo $OPS | awk -v RS=, '{print}' > /data/ops.txt
 fi
 
 if [ -n "$WHITELIST" ]; then
   log "Setting whitelist"
-  rm -rf white-list.txt.converted
-  echo $WHITELIST | awk -v RS=, '{print}' > white-list.txt
+  rm -rf /data/white-list.txt.converted
+  echo $WHITELIST | awk -v RS=, '{print}' > /data/white-list.txt
 fi
 
 if [ -n "$ICON" -a ! -e server-icon.png ]; then
@@ -41,7 +41,7 @@ fi
 
 # Make sure files exist and are valid JSON (for pre-1.12 to 1.12 upgrades)
 log "Checking for JSON files."
-JSON_FILES=$(find . -maxdepth 1 -name '*.json')
+JSON_FILES=$(find /data -maxdepth 1 -name '*.json')
 for j in $JSON_FILES; do
   if [[ $(cat "$j" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//') == "" ]]; then
     log "Fixing JSON $j"
@@ -51,9 +51,9 @@ done
 
 
 # If any modules have been provided, copy them over
-mkdir -p /data/mods
 if [ -d /mods ]; then
   log "Copying any mods over..."
+  mkdir -p /data/mods
   rsync -a --out-format="update:%f:Last Modified %M" --prune-empty-dirs --update /mods /data
 fi
 
@@ -80,7 +80,7 @@ esac
 
 EXTRA_ARGS=""
 # Optional disable console
-if [[ ${CONSOLE} = false || ${CONSOLE} = FALSE ]]; then
+if versionLessThan 1.14 && [[ ${CONSOLE,,} = false ]]; then
   EXTRA_ARGS+="--noconsole"
 fi
 
@@ -115,22 +115,39 @@ if isTrue ${ENABLE_JMX}; then
   log "JMX is enabled. Make sure you have port forwarding for ${JMX_PORT}"
 fi
 
-if isTrue ${USE_AIKAR_FLAGS}; then
-  # From https://aikar.co/2018/07/02/tuning-the-jvm-g1gc-garbage-collector-flags-for-minecraft/
-  JVM_OPTS="${JVM_XX_OPTS}
+if isTrue "${USE_AIKAR_FLAGS}"; then
+  # From https://mcflags.emc.gs/
+
+  if (( $(normalizeMemSize "${MAX_MEMORY}") >= $(normalizeMemSize 12g) )); then
+    log "Using Aikar's >12GB flags"
+    G1NewSizePercent=40
+    G1MaxNewSizePercent=50
+    G1HeapRegionSize=16M
+    G1ReservePercent=15
+    InitiatingHeapOccupancyPercent=20
+  else
+    log "Using Aikar's flags"
+    G1NewSizePercent=30
+    G1MaxNewSizePercent=40
+    G1HeapRegionSize=8M
+    G1ReservePercent=20
+    InitiatingHeapOccupancyPercent=15
+  fi
+
+  JVM_XX_OPTS="${JVM_XX_OPTS}
   -XX:+UseG1GC -XX:+ParallelRefProcEnabled
   -XX:MaxGCPauseMillis=200
   -XX:+UnlockExperimentalVMOptions
   -XX:+DisableExplicitGC
   -XX:-OmitStackTraceInFastThrow
   -XX:+AlwaysPreTouch
-  -XX:G1NewSizePercent=30
-  -XX:G1MaxNewSizePercent=40
-  -XX:G1HeapRegionSize=8M
-  -XX:G1ReservePercent=20
+  -XX:G1NewSizePercent=${G1NewSizePercent}
+  -XX:G1MaxNewSizePercent=${G1MaxNewSizePercent}
+  -XX:G1HeapRegionSize=${G1HeapRegionSize}
+  -XX:G1ReservePercent=${G1ReservePercent}
   -XX:G1HeapWastePercent=5
   -XX:G1MixedGCCountTarget=8
-  -XX:InitiatingHeapOccupancyPercent=15
+  -XX:InitiatingHeapOccupancyPercent=${InitiatingHeapOccupancyPercent}
   -XX:G1MixedGCLiveThresholdPercent=90
   -XX:G1RSetUpdatingPauseTimePercent=5
   -XX:SurvivorRatio=32
@@ -140,9 +157,22 @@ if isTrue ${USE_AIKAR_FLAGS}; then
   "
 fi
 
-mcServerRunnerArgs="--stop-duration 60s"
+if isTrue "${USE_LARGE_PAGES}"; then
+  JVM_XX_OPTS="${JVM_XX_OPTS}
+  -XX:+UseLargePagesInMetaspace
+  "
+fi
 
-if [[ ${TYPE} == "FEED-THE-BEAST" ]]; then
+mcServerRunnerArgs="--stop-duration 60s"
+if [[ ${TYPE} == "CURSE_INSTANCE" ]]; then
+    JVM_OPTS="-Xms${INIT_MEMORY} -Xmx${MAX_MEMORY} ${JVM_OPTS}"
+    if isTrue ${DEBUG_EXEC}; then
+      set -x
+    fi
+    exec mc-server-runner ${mcServerRunnerArgs} \
+      --cf-instance-file "${CURSE_INSTANCE_JSON}" \
+      java $JVM_XX_OPTS $JVM_OPTS $expandedDOpts -jar _SERVERJAR_ "$@" $EXTRA_ARGS
+elif [[ ${TYPE} == "FEED-THE-BEAST" ]]; then
     mcServerRunnerArgs="${mcServerRunnerArgs} --shell bash"
 
     if [ ! -e "${FTB_DIR}/ops.json" -a -e /data/ops.txt ]; then
diff --git a/start-utils b/start-utils
index 7ef42751..9641256e 100644
--- a/start-utils
+++ b/start-utils
@@ -48,3 +48,37 @@ function logn {
 function log {
   echo "[init] $*"
 }
+
+function normalizeMemSize {
+  local scale=1
+  case ${1,,} in
+    *k)
+      scale=1024;;
+    *m)
+      scale=1048576;;
+    *g)
+      scale=1073741824;;
+  esac
+
+  val=${1:0: -1}
+  echo $(( val * scale ))
+}
+
+function versionLessThan {
+  local activeParts
+  IFS=. read -ra activeParts <<< "${VANILLA_VERSION}"
+
+  local givenParts
+  IFS=. read -ra givenParts <<< "$1"
+
+  if (( ${#activeParts[@]} < 2 )); then
+    return 1
+  fi
+
+  if (( activeParts[0] < givenParts[0] )) || \
+     (( activeParts[0] == givenParts[0] && activeParts[1] < givenParts[1] )); then
+    return 0
+  else
+    return 1
+  fi
+}
\ No newline at end of file
diff --git a/start-validateCurseInstance b/start-validateCurseInstance
new file mode 100755
index 00000000..09af3ab5
--- /dev/null
+++ b/start-validateCurseInstance
@@ -0,0 +1,18 @@
+#!/bin/bash
+
+. /start-utils
+
+if ! [[ -v CURSE_INSTANCE_JSON ]]; then
+  log "ERROR: CURSE_INSTANCE_JSON needs to be set"
+  exit 2
+elif ! [ -f "${CURSE_INSTANCE_JSON}" ] && [ -f "${CURSE_INSTANCE_JSON}/minecraftinstance.json" ]; then
+  CURSE_INSTANCE_JSON="${CURSE_INSTANCE_JSON}/minecraftinstance.json"
+elif ! [ -f "${CURSE_INSTANCE_JSON}" ]; then
+  log "ERROR: CURSE_INSTANCE_JSON file does not exist: ${CURSE_INSTANCE_JSON}"
+  exit 2
+fi
+
+log "Resolved CURSE_INSTANCE_JSON as ${CURSE_INSTANCE_JSON}"
+
+# Continue to Final Setup
+exec /start-finalSetup01World "$@"