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+Testing Checklist -- eaa5fd3 through 2026-07-19
+Branch: 5.1.0b-in-progress
+Last known-good pod test: before eaa5fd3
+================================================
+
+1. DUAL MFD (mode 4) -- right device stagger fix
+   [ ] In a pod with two MFD screens (mode 4), verify right MFD shows correct
+       channel data (channels 3-4) and does not flash blank/grid-only frames
+   [ ] Left MFD still shows channels 0-2 correctly at all times
+   [ ] Radar display unaffected
+   [ ] Mode 1 (single MFD) still works normally (code path unchanged)
+
+2. SERIAL RIO / -tbaud BAUD RATE SCALING
+   [ ] Default 9600 baud RIO board: poll timeout is 50 ms (same as before)
+   [ ] High-speed board at 115200 baud: poll timeout is ~5 ms (faster response)
+   [ ] Custom -tbaud 31250: timeout is ceil(480000/31250) = 16 ms
+   [ ] Verify no regression in button/lamp/analog response at all three rates
+   [ ] Verify game launches normally without -tbaud flag
+
+3. MULTIPLAYER -- 16 PILOTS + 1 CAMERASHIP
+   [ ] Host a 16-player game; a 17th connection as cameraship can join without
+       "Too many player/bots" error
+   [ ] The cameraship slot does not count against the pilot cap in the lobby
+   [ ] Standard 16-pilot session (no cameraship) still works normally
+   [ ] Player limit slider in lobby still functions correctly at runtime
+   [ ] COOP mode unaffected (still caps at 9 pilots + bots)
+
+4. MECH LOADOUTS
+   [ ] Battlemaster IS: spawns with PPC, 6x ML (3 RT/3 LT), 2x MG (200 rds), SRM6 (15 rds)
+   [ ] Battlemaster IS: all weapons in group 1 except SRM6 (group 2)
+   [ ] Battlemaster Clan 2C: spawns with ER PPC, 6x ER ML, 2x Clan Gauss (16 rds each), Clan SSRM6 (15 rds)
+   [ ] Behemoth / Behemoth II: Gauss rifles fire with group 1 (not group 3)
+
+5. CONLOBBY -- V5.1.0b1 / SUPER6 MECH ROTATION
+   [ ] Console title displays "BattleTech Console V5.1.0b1"
+   [ ] Rookie mech cycle shows 6 mechs: Archer, Loki, Madcat, Thor, Vulture, Warhammer
+   [ ] Right-click random mech picks from all 6 (not 5)
+   [ ] MP time-limit dropdown shows 18 entries (1-15, 20, 25, 30 min) and scrolls correctly
+   [ ] Lobby launches correctly with 1-16 players
+
+6. MW4PRINT v2.0
+   [ ] Print job completes normally; version banner shows "2.0 / 2026"
+   [ ] File -> Database Settings (Ctrl+D) dialog opens; MySQL host/user/pass/db fields editable
+   [ ] With a MySQL server configured, a print job exports match data to the database
+   [ ] Without MySQL configured (or libmysql.dll absent), print job completes silently with no crash
+   [ ] File -> Banner Setting... opens; changing the text updates the printed bottom-of-sheet URL
+   [ ] Banner setting persists after closing and reopening mw4print
+
+7. LANGUAGE DLL -- ENGLISH BUTTON LABELS
+   [ ] After a game crash/exception, the GameOS error dialog shows English button
+       labels (More Details / Continue / Exit) instead of Korean ??? characters
+
+8. SOURCE ENCODING / BUILD HEALTH
+   [ ] Full Release build completes 0 errors (the min/max fix was the last issue)
+   [ ] No new warnings introduced beyond the pre-existing 384