diff --git a/README.md b/README.md
index a2241df..97ad2bd 100644
--- a/README.md
+++ b/README.md
@@ -47,4 +47,5 @@ RGB LED control tool for EdgeTX 2.11+ radios.
 ## Notes
 
 - Requires EdgeTX 2.11 or newer.
+- Animates decorative gimbal / "bling" LEDs only (20 LEDs on TX16S Mk3, GX15 and TX15). Custom function switch RGB colours stay under Radio/Model settings.
 - The keeper polls `/SCRIPTS/TOOLS/RGB.dat` and runs the selected mode, so no other mode scripts are needed.
diff --git a/SCRIPTS/RGBLED/rgbk.lua b/SCRIPTS/RGBLED/rgbk.lua
index acd617f..9bce3c7 100644
--- a/SCRIPTS/RGBLED/rgbk.lua
+++ b/SCRIPTS/RGBLED/rgbk.lua
@@ -15,8 +15,42 @@
 -- on-screen preview matches exactly what the keeper runs on the radio.
 
 local CFG = "/SCRIPTS/TOOLS/RGB.dat"
-local N = LED_STRIP_LENGTH or 0
-local HALF = math.floor(N / 2)
+
+-- Decorative ("bling") LEDs only. Firmware maps Lua index 0 to the first
+-- gimbal/bling LED. Function-switch LEDs stay under model on/off colours /
+-- setCFSLedColor() and must not be painted here.
+local function decorativeLength()
+  if type(BLING_LED_STRIP_LENGTH) == "number" and BLING_LED_STRIP_LENGTH > 0 then
+    return BLING_LED_STRIP_LENGTH
+  end
+  local n = LED_STRIP_LENGTH or 0
+  if type(CFS_LED_STRIP_LENGTH) == "number" and CFS_LED_STRIP_LENGTH > 0 and n >= CFS_LED_STRIP_LENGTH then
+    return n - CFS_LED_STRIP_LENGTH
+  end
+  -- Pre-constant firmware: TX16S Mk3 / GX15 / TX15 report 20 bling + 6 CFS.
+  if n == 26 then return 20 end
+  return n
+end
+
+local N = decorativeLength()
+local HALF = math.max(1, math.floor(N / 2))
+
+-- Bound every write to the decorative range so leftover CFS indices are never
+-- touched, even if a pattern hardcodes a 10+10 gimbal layout.
+local _setRGB = setRGBLedColor
+local _applyRGB = applyRGBLedColors
+
+local function setRGBLedColor(id, r, g, b)
+  if type(_setRGB) ~= "function" then return false end
+  if type(id) ~= "number" or id < 0 or id >= N then return false end
+  return _setRGB(id, r, g, b)
+end
+
+local function applyRGBLedColors()
+  if type(_applyRGB) == "function" then
+    _applyRGB()
+  end
+end
 
 local curSel = nil
 local runFn = nil
diff --git a/SCRIPTS/TOOLS/RGB.lua b/SCRIPTS/TOOLS/RGB.lua
index e49e91b..479b4b8 100644
--- a/SCRIPTS/TOOLS/RGB.lua
+++ b/SCRIPTS/TOOLS/RGB.lua
@@ -3,7 +3,8 @@
 local LED_DIR = "/SCRIPTS/RGBLED"
 local CFG_FILE = "/SCRIPTS/TOOLS/RGB.dat"
 -- Native "RGB Led" special function: loads <name>.lua from /SCRIPTS/RGBLED/
-local FUNC_RGB_LED = 25
+-- Prefer the firmware constant so a future enum shift does not break setup.
+local RGB_LED_FUNC = (type(FUNC_RGB_LED) == "number") and FUNC_RGB_LED or 25
 -- Fixed Special Function slot for the keeper script (SF64 = index 63)
 local SF_SLOT = 63
 local KEEPER_NAME = "rgbk"
@@ -12,6 +13,7 @@ local CUSTOM_PREFIX = "custom:"
 
 local exitRequested = false
 local noLvgl = false
+local noLeds = type(setRGBLedColor) ~= "function" or type(applyRGBLedColors) ~= "function"
 local selected = nil
 local subtitle = ""
 local buttons = {}
@@ -156,7 +158,7 @@ end
 local function keeperInstalled()
   if type(model.getCustomFunction) ~= "function" then return false end
   local cur = model.getCustomFunction(SF_SLOT)
-  return cur ~= nil and cur.func == FUNC_RGB_LED and cur.name == KEEPER_NAME and cur.active == 1
+  return cur ~= nil and cur.func == RGB_LED_FUNC and cur.name == KEEPER_NAME and cur.active == 1
 end
 
 -- Install the keeper Special Function once. After it exists (and is enabled)
@@ -169,7 +171,7 @@ local function ensureKeeper()
     return
   end
   local cur = model.getCustomFunction(SF_SLOT)
-  local ours = cur ~= nil and cur.func == FUNC_RGB_LED and cur.name == KEEPER_NAME
+  local ours = cur ~= nil and cur.func == RGB_LED_FUNC and cur.name == KEEPER_NAME
   if cur ~= nil and type(cur.func) == "number" and cur.func ~= 0 and not ours then
     lvgl.message({ title = "SF64 in use",
       message = "Special Function SF64 is already assigned to a different function. Free it to let the RGB LED tool use it." })
@@ -182,7 +184,7 @@ local function ensureKeeper()
   end
   model.setCustomFunction(SF_SLOT, {
     switch = onSwitch,
-    func = FUNC_RGB_LED,
+    func = RGB_LED_FUNC,
     name = KEEPER_NAME,
     active = 1,
   })
@@ -228,8 +230,10 @@ end
 local function selectMode(name)
   selected = name
   saveSelection(name)
-  preview(name)
-  ensureKeeper()
+  if not noLeds then
+    preview(name)
+    ensureKeeper()
+  end
   for key, _ in pairs(buttons) do
     setChecked(key, key == name)
   end
@@ -254,9 +258,15 @@ local function buildUi()
   local MARGIN = 8
   local GAP = 6
   local LABEL_H = 28
-
   local y = MARGIN
 
+  if noLeds then
+    pg:label({ x = MARGIN, y = y, w = W - 2 * MARGIN,
+      text = "This radio has no RGB LED strip (setRGBLedColor missing).",
+      color = COLOR_THEME_WARNING })
+    y = y + LABEL_H + GAP
+  end
+
   local offBtn = pg:button({ x = MARGIN, y = y, w = W - 2 * MARGIN, h = EH,
     text = "Off",
     color = function() return COLOR_THEME_PRIMARY3 end,
@@ -272,8 +282,9 @@ local function buildUi()
     text = "Setup Background Script on Model",
     color = function() return rgbValue({ r = 30, g = 120, b = 255 }, true) end,
     textColor = function() return rgbValue({ r = 30, g = 120, b = 255 }, false) end,
-    active = function() return not keeperInstalled() end,
+    active = function() return not noLeds and not keeperInstalled() end,
     press = function()
+      if noLeds then return end
       ensureKeeper()
       if keeperInstalled() then
         lvgl.message({ title = "Background Script Installed",
@@ -341,6 +352,11 @@ local function init()
   if ok and info and type(info) == "table" then
     subtitle = info.name or ""
   end
+  if type(BLING_LED_STRIP_LENGTH) == "number" and BLING_LED_STRIP_LENGTH > 0 then
+    subtitle = (subtitle ~= "" and (subtitle .. " · ") or "") .. tostring(BLING_LED_STRIP_LENGTH) .. " LEDs"
+  elseif type(LED_STRIP_LENGTH) == "number" and LED_STRIP_LENGTH > 0 then
+    subtitle = (subtitle ~= "" and (subtitle .. " · ") or "") .. tostring(LED_STRIP_LENGTH) .. " LEDs"
+  end
   if lvgl == nil then
     noLvgl = true
     return
@@ -365,7 +381,7 @@ local function run(event, touchState)
     end
     return 0
   end
-  if selected then
+  if not noLeds and selected then
     preview(selected)
   end
   if exitRequested then