i have heard that bad vibrations, either too much or at a certain resinance will cause bad signals via the peizoelectric crystal itself. unless you are going to be pulling mega gs, i would reccomend using one layer of the gyro mounting tape or mirror tape for electrics and two layers for gas. two layers lowers the frequency at which it absorbs vibration the best, and the vibration from reciprocating engines is at a much lower "tone" and much much harder than it's electric counterparts. however, if you have too much mounting stuff, the gyro may flop around just enough to cause bad signals as well, so be ware. there are a few commercially produced gyros out there with almost no drift at all, such as the futaba heli gyros. i have used these in the past and i was extremely impressed. owever, calibrating the gyros every few seconds would be a great idea providing that the vibrations do not alter any re-calibration signals because if it does it will throw the gyro way off and it will re calibrate under the false reading coming from a vibration pulse affecting the whater thingies you mentioned for gravitational referance.