diff --git a/Posts/OpenNest.Posts.CincinnatiCIFiber/CIFiberPostConfig.cs b/Posts/OpenNest.Posts.CincinnatiCIFiber/CIFiberPostConfig.cs
index 659986db..ecd087fb 100644
--- a/Posts/OpenNest.Posts.CincinnatiCIFiber/CIFiberPostConfig.cs
+++ b/Posts/OpenNest.Posts.CincinnatiCIFiber/CIFiberPostConfig.cs
@@ -114,15 +114,17 @@ namespace OpenNest.Posts.CincinnatiCIFiber
 
         /// <summary>
         /// Line written to swap pallets: after the last sheet, and between sheets
-        /// in a single program. M50 is the Cincinnati pallet change (machine sample
-        /// tail, CL-series manual EM-423 §3.50; confirmed by the machine owner): it
-        /// moves the cut sheet out for unloading before M30. Blank writes no pallet
-        /// change.
+        /// in a single program. Cincinnati's CNC Codes Handbook calls M50 "Table In":
+        /// the waiting pallet moves into the laser, which sends the cut pallet out
+        /// for unloading (machine sample tail; reading confirmed by the machine
+        /// owner). It expects the waiting pallet to be loaded. M51 ("Table Out")
+        /// only sends the pallet out. Blank writes no pallet change.
         /// </summary>
         [DisplayName("Pallet change code")]
         [Description(
-            "Written after each sheet to swap pallets, moving the cut sheet out for unloading. "
-                + "Cincinnati uses M50. Blank writes no pallet change."
+            "Written after each sheet to swap pallets. Cincinnati's M50 (Table In) brings the "
+                + "waiting pallet into the laser and sends the cut sheet out, so load the waiting "
+                + "pallet first. Blank writes no pallet change."
         )]
         [PostSetting(SheetsSection, 1)]
         public string PalletChangeCode { get; set; } = "M50";
diff --git a/docs/cincinnati-ci-fiber-post-output.md b/docs/cincinnati-ci-fiber-post-output.md
index 73eb4f1b..f5daceaf 100644
--- a/docs/cincinnati-ci-fiber-post-output.md
+++ b/docs/cincinnati-ci-fiber-post-output.md
@@ -81,10 +81,14 @@ validated and saved only when OK is pressed.
   change separate sheets, and the header carries the first sheet's size. Sheets
   of different sizes are rejected in this mode. Posting to a stream always
   produces one program, so it rejects a multi-sheet nest in per-sheet mode.
-- `PalletChangeCode` defaults to `M50`, the Cincinnati pallet change: the machine
-  sample ends `L PROGRAMEND.NC`, `M50`, `M30`, moving the cut sheet out for
-  unloading before the program ends (CL-series manual EM-423 §3.50; confirmed by
-  the machine owner).
+- `PalletChangeCode` defaults to `M50`, as in the machine sample, which ends
+  `L PROGRAMEND.NC`, `M50`, `M30`. Cincinnati's CNC Codes Handbook calls M50
+  "Table In" and M51 "Table Out". On the CI Fiber the head stays at a fixed height
+  and the pallets shuffle and lift to swap. Table In moves the waiting pallet into
+  the laser, which sends the cut pallet out for unloading, so M50 is the swap
+  (reading confirmed by the machine owner). It expects the waiting pallet to be
+  loaded. Newer Cincinnati samples end with `M30` and no pallet code; clear
+  the setting to match.
 - **Release blocker:** the single-program sequence between sheets (`/L "L0"`, then
   `M50`, then the next sheet with no new header or start macro) is inferred, not
   observed. Confirm it against a Cincinnati multi-sheet sample before release, or