Does it use DIP switches for programming?
I have the manual for the 18.46 F2B, I can scan and post it tomorrow.(Assuming I can find it
)
For the 18.46, the things that make it suitable for F2B are the brake in governor mode, and the operating RPM range and fineness of the adjustment.
The regular controllers don't have brake in heli governor mode, and the RPM range they cover is much larger so the adjustments end up being fairly coarse.
For governed mode they just sort of work, no muss no fuss. I don't know if they will work as effectively with an active system however.
Pat MacKenzie