RE: Snap rolls with gyros?
The problem is that the gyro will end up fighting the pilot while performing aerobatics. It may be an advantage to 3D flying while hovering and such but while setting up for a spin or doing a snap roll ( Not what the op described by the way ) the gyros will fight against what the airplane is doing unless you set it up on a switch to turn it off on those manuvers. Just for the record, all use of gyros are prohibited in ANY form of aerobatic competition and IMO the use of them will only teach you bad habits that will handicap you should you ever want to compete.