You may be onto something regarding vibration. I had a FlyCam for a while but only used it on one of my electrics. It worked okay but I was pretty disappointed with the image quality. After a couple of sessions and some aggravation in trying (and failing) to figure out how to trip the shutter with the transmitter, I packed it back up in the box it came in and sold the danged thing for $50 at the last swap meet. Here's a picture from it. That's my blue truck parked by the pond.