Hello Skipper, the Beech 18 worked superb in my 4.12.2 with ModAct 5.33.
I tried her in my 4.11.1 with ModAct 4 and I got a CTD at 100% while loading the QMB mission, the 409 file cured that problem, lovely.
Log from that event for reference:
loaded from File: 'beechc_fm'
[10:50:39] FM called 'FlightModels/BeechC.fmd:BeechC_FM' is being loaded from File: 'beechc_fm'
[10:50:47] FM called 'FlightModels/BeechC18.fmd:BeechC18_FM' is being loaded from File: 'beechc18_fm'
[10:50:47] FM called 'FlightModels/BeechC18.fmd:BeechC18_FM' is being loaded from File: 'beechc18_fm'
[10:50:48] INTERNAL ERROR: HierMesh: Can't find chunk 'GunBREDA'
[10:50:49] ##### House without collision (3do/Buildings/Furniture/Sandbags_Round/live.sim)
[10:50:54] ERROR file: File users/doe/Icons not found
[10:50:54] Mission: QuickQMBPro/Crimea/CrimeaBlueScramble00.mis is Playing
[10:50:54] INTERNAL ERROR: HierMesh: Can't find chunk 'GearC3_D0'
[10:50:55] warning: no files : music/takeoff
[10:51:42] warning: no files : music/inflight
[10:54:25] warning: no files : music/takeoff
[10:57:26] Loading mission QuickQMBPro/Crimea/CrimeaBlueScramble00.mis...
[10:57:26] Loaded camouflage: SUMMER
[10:57:26] Month = 7 , Hour = 14
[10:57:26] Temperature - 0m = 26.0 .
[10:57:26] Temperature - 1000m = 19.51001 .
[10:57:26] Temperature - 2000m = 13.019989 .
[10:57:26] Temperature - 3000m = 6.529999 .
[10:57:26] Temperature - 4000m = 0.040008545 .
[10:57:26] Temperature - 5000m = -6.450012 .
[10:57:26] Temperature - 6000m = -12.940002 .
[10:57:26] Temperature - 7000m = -19.429993 .
[10:57:26] Temperature - 8000m = -25.919998 .
[10:57:26] Temperature - 9000m = -32.410004 .
[10:57:26] Temperature - 10000m = -38.899994 .
[10:57:26] Temperature - 11000m = -45.39 .
[10:57:26] Temperature - 12000m = -51.880005 .
[10:57:26] Loading map.ini defined airfields:
[10:57:26] WARNING: ObjectVACache_Clear()
[10:57:26] WARNING: * Buf0 : Obj: 160, Vert 7206, Ind 17142
[10:57:26] WARNING: * Buf1 : Obj: 659, Vert 71716, Ind 203232
[10:57:26] WARNING: * Buf2 : Obj: 53, Vert 23092, Ind 36648
[10:57:27] Load bridges
[10:57:27] Load static objects
[10:57:35] FM called 'FlightModels/BeechC18.fmd:BeechC18_FM' is being loaded from File: 'beechc18_fm'
[10:57:35] FM called 'FlightModels/BeechC18.fmd:BeechC18_FM' is being loaded from File: 'beechc18_fm'
[10:57:35] INTERNAL ERROR: HierMesh: Can't find chunk 'GunBREDA'
[10:57:35] FM called 'FlightModels/BeechC18.fmd:BeechC18_FM' is being loaded from File: 'beechc18_fm'
[10:57:36] FM called 'FlightModels/BeechC18.fmd:BeechC18_FM' is being loaded from File: 'beechc18_fm'
[10:57:36] INTERNAL ERROR: HierMesh: Can't find chunk 'GunBREDA'
[10:57:39] ERROR file: File users/doe/Icons not found
[10:57:39] Mission: QuickQMBPro/Crimea/CrimeaBlueScramble00.mis is Playing
[10:57:39] java.lang.NoSuchMethodError
[10:57:39] at com.maddox.il2.objects.air.CockpitBC18.reflectWorldToInstruments(CockpitBC18.java:150)
[10:57:39] at com.maddox.il2.objects.air.Cockpit$Draw.preRender(Cockpit.java:709)
[10:57:39] at com.maddox.il2.objects.air.Cockpit.preRender(Cockpit.java:846)
[10:57:39] at com.maddox.il2.game.Main3D$RenderCockpit.preRender(Main3D.java:734)
[10:57:39] at com.maddox.il2.engine.Renders.doPaint(Renders.java:392)
[10:57:39] at com.maddox.il2.engine.Renders.paint(Renders.java:307)
[10:57:39] at com.maddox.il2.engine.RendersTicker.msgTimeOut(Renders.java:637)
[10:57:39] at com.maddox.rts.MsgTimeOut.invokeListener(MsgTimeOut.java:73)
[10:57:39] at com.maddox.rts.Message._send(Message.java:1217)
[10:57:39] at com.maddox.rts.Message.sendToObject(Message.java:1191)
[10:57:39] at com.maddox.rts.Message.sendTo(Message.java:1134)
[10:57:39] at com.maddox.rts.Message.trySend(Message.java:1115)
[10:57:39] at com.maddox.rts.Time.loopMessages(Time.java:252)
[10:57:39] at com.maddox.rts.RTSConf.loopMsgs(RTSConf.java:101)
[10:57:39] at com.maddox.il2.game.MainWin3D$Background.step(MainWin3D.java:159)
[10:57:39] at com.maddox.rts.BackgroundTask.doRun(BackgroundTask.java:167)
[10:57:39] at com.maddox.il2.game.MainWin3D.loopApp(MainWin3D.java:108)
[10:57:39] at com.maddox.il2.game.Main.exec(Main.java:439)
[10:57:39] at com.maddox.il2.game.GameWin3D.main(GameWin3D.java:235)
Wishing you all the very best, Pete.