diff --git a/players/README.txt b/players/README.txt
index 2f2ed83..58e79b9 100644
--- a/players/README.txt
+++ b/players/README.txt
@@ -44,7 +44,8 @@ never uploaded and only exists on your machine.
 You start INSIDE the cockpit with the pod's MFD panels composited
 around the view (one window).  The red MFD buttons, radar rails and
 joystick buttons are all MOUSE-CLICKABLE -- right-click a button to
-latch it held.  Press V any time to toggle the external camera.
+latch it held.  Press ` (backtick) any time to toggle the external
+camera.
 
 CONTROLS (keyboard) -- NEW DEFAULT LAYOUT THIS BUILD:
   The keyboard IS the cockpit button board now: the letter and number
diff --git a/tools/mkdist.py b/tools/mkdist.py
index 554f654..356c5db 100644
--- a/tools/mkdist.py
+++ b/tools/mkdist.py
@@ -75,6 +75,22 @@ def main():
     zpath = os.path.join(outdir, name + ".zip")
 
     exes = ["build/Release/btl4.exe"]
+
+    # HONESTY CHECK (2026-07-26): the RGB keylight compiles to a dormant stub
+    # on machines whose Windows SDK is too old (< 10.0.22000 -- see
+    # CMakeLists), and the README promises the feature.  Say so at cut time,
+    # so nobody ships a stub build believing the promise.
+    try:
+        with open(exes[0], "rb") as f:
+            if b"built without Dynamic Lighting support" in f.read():
+                print("  *** NOTE: this exe carries the KEYLIGHT STUB (build "
+                      "machine's SDK too old).  The README's RGB-keyboard "
+                      "feature will be dormant in this zip -- build on a "
+                      "machine with SDK >= 10.0.22000 to ship the real "
+                      "mirror. ***")
+    except OSError:
+        pass
+
     bats = ["players/play_solo.bat", "players/join.bat", "players/join_lan.bat",
             "players/joyconfig.bat"]
     if steam_on: