Gavin, this is the default panel.cfg for the CFS1 P51D:
// Panel Configuration file
// Bf109
[Window Titles]
Window00=P51d -- Main Panel
Window01=P51d -- Engine Controls
[Window00]
file=Panel_Background_640.BMP
file_1024=Panel_Background_1024.BMP
position=7
size_mm=640,480
window_pos=0.0,0.0
window_size=1.000,1.000
render_3d_window=1
pixel_size=0,0
sizeable=1
visible=1
ident=MAIN_PANEL
gauge00=P51d!Airspeed,181,343
gauge01=P51d!Altimeter,181,413
gauge02=P51d!Attitude,323,343
gauge03=P51d!Boost_Pressure,395,351
gauge04=P51d!Clock,209,293
gauge05=P51d!Engine_Temperature,379,292
gauge06=P51d!Flaps,134,358
gauge07=P51d!Fuel,467,375
gauge08=P51d!Fuel_Selector,523,441
gauge09=P51d!Gear,75,458
gauge10=P51d!Heading_Indicator,253,329
gauge11=P51d!Magneto,88,411
gauge12=P51d!Oil_Pressure,467,426
gauge13=P51d!Starter,147,436
gauge14=P51d!Tachometer,395,413
gauge15=P51d!Turn_Indicator,253,413
gauge16=P51d!Vertical_Speed,323,413
[Window01]
file=Thrust_Lever_Background.BMP
position=6
size_mm=76,130
window_pos=0.0,0.730
window_size=0.118,0.271
sizeable=1
visible=0
ident=THROTTLE_PANEL
gauge00=P51d!thrust_controls,0,0
[VCockpit01]
file=
position=7
size_mm=256,256
window_pos=0.306,0.468
window_size=0.401,0.533
pixel_size=256,256
texture=$P51d
background_color=1,1,1
visible=0
gauge00=P51d!Airspeed,184,343,67,67
gauge01=P51d!Turn_Indicator,124,56,66,67
gauge02=P51d!Starter,124,13,16,41
gauge03=P51d!Magneto,141,9,47,46
gauge04=P51d!Gear,37,216,63,22
gauge05=P51d!Fuel,205,142,49,52
gauge06=P51d!Engine_Temperature,8,86,52,57
gauge07=P51d!Boost_Pressure,63,138,64,63
gauge08=P51d!Altimeter,189,76,67,67
gauge09=P51d!Vertical_Speed,61,74,63,63
gauge10=P51d!Tachometer,59,11,61,61
gauge11=P51d!Oil_Pressure,200,193,54,55
gauge12=P51d!Heading_Indicator,128,123,63,81
gauge13=P51d!Fuel_Selector,156,204,42,38
gauge14=P51d!Flaps,21,11,36,75
gauge15=P51d!Clock,101,201,46,47
gauge16=P51d!Attitude,0,145,66,70,FORCE_TRANS
gauge17=P51d!Airspeed,189,9,67,67
[8 Bit Colors]
PALETTE=PALETTE.BMP
[Default View]
X=0
Y=0
SIZE_X=8191
SIZE_Y=5000
Note that there is no dedicated gunsight gauge anywhere in the cfg, which leads one to deduce that any gyro sighting apparatus is either designed exclusively into the P-51 mdl file as a VC component or it resides in one of the dll modules in the MODULES folder and is only active for the Mustang model alone. I would suspect the former, since there are no dedicted dll's by name for the Mustang in the MODULES folder that would activate this in that single model. Now, of course, you can fly this CFS1 model in CFS2 without issues, but the CFS2 engine apparently doesn't support this exclusive VC gunsight feature and in 2D view will supersede it with the universal default gunsight64.bmp from the main Texture folder, which is applied to all of your models.