Today I did some more flying with your wonderful product.
Well why not some night flying, I thought. So I flew from EHLE Rwy 23 to EHAM Rwy 27.
My default startup in FS2004 is on Rwy 23 EHLE in the RLA in daylight.
Then I hit ALT->World->Time and so on till I have Night mode.
Full Throttle and off I went. Heh, what the heck, why is my gyro indicating 050 and not 230?
During flight I switched to the HB-DBL and I had gyro 230 again, finished the flight and thought, well a hickup of FS.
Then I started experimenting a bit and bear with me for the remainder of this message.
First I thought it could be the add-on scenery of the Netherlands and I switched to the default scenery of FS2004. No difference!
I started on St. Maarten, Dutch Caribean on Rwy 09 in the RLA at Dawn.
I switched to SF3. Gyro automatically goes to 180
I hit the letter D on the keyboard and Gyro goes to 090
I switched to DAYLIGHT. Gyro goes auto to 180
I hit D and Gyro stays at 180
I switched to RLA. Gyro goes auto to 200
I hit D and gyro goes to 090
I switched to SF3. Gyro goes to auto 200
I hit D and gyro goes to 090
I switched to DUSK. (still in SF3) Gyro goes auto to 190
I hit D and Gyro stays at 190
I switched to RLA. Gyro goes auto to 170
I hit D and Gyro goes to 090
I went further with switching from DUSK to NIGHT and switching also between the HB-DBL and the other 2 91D models and I kept having erratic behaviour of the Gyro.
To be sure I switched also between 2 Cessna models and between DAY and NIGHT. No such behaviour.
Hope you can sleep after this message

Regards, Sjoerd
P.S. The 3D instrument panel is outstanding in the NIGHT flying mode.
And the reflection of the lighted instruments in the sidewindows is SUPERB!!
Bravo!