I had exactly the same problem 'Kept switching off in flight' I have just installed a new internal 220mAh liPo and it is working great and does not switch off in flight. Keep a check on battery and do not let voltage go to low, remember it is a lipo! I always stick on charge after it has been used a couple of times and keep the lipo topped up, I reckon that's the problem with some folks batteries that the battery has became discharged which then will reduce the capacity etc.

As regards to vibration I have had my flycamone 2 mounted on my Edge 540 on the top deck 4" away from a YS63S with perfect results and if that is not a test for vibration then I don't know what would be!

Also I have ran on a Graupner Terry S glider and no problems and also on my jets but as folks have said no vibrations. I do think the main problem with most of the flycamone 2's are the battery, also when you use inside the house the 'bad' batteries seem to last but out in the 'cold' it fades away very quick!

Alan