Non-standard compass orientation

Sorry if question is very stupid.
Is it OK if the orientation of the compass is not in 45 degrees increments related to the autopilot board? (for example compass is rotated 10 degrees relative to main board)
Will calibration / inflight learning of compass offsets account for this error?
Or is it strict requirement to have compass angle to be in 45 degrees increments in relation to autopilot board?
Thank you in advance!

You need to use a custom rotation - it won’t be determined automatically.

Thank you!
Follow-up question:
are CUST_ROT* parameters relate to Compass only or to Accelerometer/Gyro as well?

My main board which have Accel/Gyro inside is aligned perfectly with copter so no rotation (like 0 degrees) needed for it.
It’s external (BN-880q) compass on a mast is rotated due to it was glued incorrectly to the mast.

Thank you!

You use the orientation by setting COMPASS_ORIENT to 101 or 102 so it only applies to the compass

Thank you, now it’s clear!