Hehe...those foam rubber wraps they give you when you buy a new rx is there for a reason. I had a hitec 6 channel rx. It was small,
good size for electric flight. Generally, I will put velcro on rx's to hold them in place on foamie type planes. Started using it on my glow planes. No problems...even been in a few crashes. Had a new Cessna Skylane, OS .46 AX power. Put that rx in the plane.
And, just used velcro to hold the rx in. Worked fine until one flight, I was up about 150 feet and was in a nice scale looking left hand turn. Tried to level wings out and got nothing. Plane kept turning left in circles while dropping...dropped right into the ground destroying plane. Upon post crash investigation, it was revealed that the xtal in the rx had fractured!!! I've since have wrapped all my
rx's in glow planes in foam ever since. I had the rx velcro'd to the inner side of the fuse. Apparently, the vibration from a running engine shook the living daylights out of the rx.

Dave...