diff --git a/overlay/opt/emcomm-tools/conf/radios.d/bg2fx-fx4cr.json b/overlay/opt/emcomm-tools/conf/radios.d/bg2fx-fx4cr.json
index 15a587c..e1d75ae 100644
--- a/overlay/opt/emcomm-tools/conf/radios.d/bg2fx-fx4cr.json
+++ b/overlay/opt/emcomm-tools/conf/radios.d/bg2fx-fx4cr.json
@@ -5,20 +5,24 @@
   "rigctrl": {
     "id": "2031",
     "baud": "115200",
-    "ptt": "RTS",
+    "ptt": "RIG",
+    "conf": "data_bits=8,serial_handshake=None,stop_bits=1,rts_state=OFF",
     "pttOnly": "false"
   },
   "notes": [
-    "THESE NOTES ARE A WORK IN PROGRESS",
     "Short press [PWR], then rotate AF knob until POW = 5.0",
     "Toggle [SSB] button until both USB and DIG appear",
     "Short press [M. V] until VFOA is displayed",
+    "Long press [MENU], rotate AF to BLUETOOTH, rotate TUNE and set to 0",
     "Set radio volume to 50",
-    "Set mic gain to ?",
-    "Set alsamixer PCM to ?",
-    "Set alsamixer Mic to 50",
+    "Set mic gain to 50",
+    "Set alsamixer PCM to 21",
+    "Set alsamixer Mic to 55",
     "Set alsamixer AFC to mm"
   ],
   "fieldNotes": [
+    "Tested with FX-4CR firmware version: 1.7.3 (2025/09/01)",
+    "You must force the RTS control line to low for audio output to work with the PTT",
+    "This is handled with rts_state=OFF using the --set-conf argument of rigctld"
   ]
 }
diff --git a/overlay/opt/emcomm-tools/sbin/wrapper-rigctld.sh b/overlay/opt/emcomm-tools/sbin/wrapper-rigctld.sh
index 1c1b9ab..534dd99 100755
--- a/overlay/opt/emcomm-tools/sbin/wrapper-rigctld.sh
+++ b/overlay/opt/emcomm-tools/sbin/wrapper-rigctld.sh
@@ -2,13 +2,16 @@
 #
 # Author  : Gaston Gonzalez
 # Date    : 9 October 2024
-# Updated : 31 May 2025
+# Updated : 26 September 2025
 # Purpose : Wrapper startup/shutdown script around systemd/rigctld
 
 ET_HOME=/opt/emcomm-tools
 ACTIVE_RADIO="${ET_HOME}/conf/radios.d/active-radio.json"
 CAT_DEVICE=/dev/et-cat
 
+# Additional configuration to pass to rigctld
+SET_CONF=""
+
 do_full_auto() {
   et-log "Found ET_DEVICE='${ET_DEVICE}'"
 
@@ -95,8 +98,14 @@ start() {
     exit 0
   fi
 
+  # Handle optional configuration settings
+  CONF=$(jq -e -r '.rigctrl.conf' "${ET_HOME}/conf/radios.d/active-radio.json")
+  if [[ $? -eq 0 ]]; then
+    SET_CONF="--set-conf=${CONF}"
+  fi
+
   # Generate command
-  CMD="rigctld -m ${ID} -r ${CAT_DEVICE} -s ${BAUD} -P ${PTT} "
+  CMD="rigctld -m ${ID} -r ${CAT_DEVICE} -s ${BAUD} -P ${PTT} ${SET_CONF}"
   et-log "Starting rigctld with: ${CMD}"
   $CMD
 }