Several people have wrapped their Garmin eTrex GPS unit in bubble wrap and shoved it into the payload bay. I've got a Vista
I've got the soft carrying case for it and was considering duct tape to hold that to the plywood altimeter mount.
Any other suggestions for a rugged mounting in a 4" diameter payload bay for a J350 launch?
The various accessories for attaching the unit to bicycle handlebars and such use a replacement for the battery cover and the single "T pin" to restrain the device. Seems kind of flimsy...