So question for the Aerobatic pilots and instrument mechanics out there: What is the short, medium and long term impact of performing aerobatic maneuvers on gyro-based instruments? I had access to a C150 Aerobat that was nicely equipped with a full 6-pack, dual glideslopes and a Garmin GPS; it was IFR certified. The flight school did not like and strongly discouraged (bordering on outright prohibiting) any aerobatic maneuvers due to the impact of the maneuvers on the instruments and presumably the impact on the IFR certification. I never really questioned further about what impact they were referring to and the long term effects of the maneuvers on the instruments as I also had access to a Citabria which had no working gyro based instruments (a turn coordinator was installed but except for the gravity ball, it did not function) that I used for all my aerobatic flights. I understand aerobatics will tumble the gyros and they might not fully, partially or accurately recover in flight and thus be unusable for the duration of that flight but does it do any damage to the instrument? I'm looking at purchasing my own Citabria or other aerobatic capable tailwheel and many of them have had full functioning 6-packs. Considering the school's prohibition in their very capable Aerobat which was fully capable, I was wondering what I was missing in relation to instrument panel. Thanks!