I'm doing AV with a Soarstar, a Wingo knockoff. I went to the craft store and got a chunk of foam (the kind used in cheap pillows), trimmed to fit in battery compartment and used industrial Velcro to mount camera to it. Works great and jettisons on impact to save camera ( not that I've ever had an impact to jettison from
)
Velcro the TX to the side adjusted for CG. Doesn't seem to see the extra weight ( even powered w/9v battery)
Dave