ORIGINAL: TedMo
I prefer to use Du Bro 1/4 " foam for both RX and Battery. However have also often used the foam padding that they use for underlayment beneath rugs and have never had any problems using it for vibration or crash protection.It's odd that we spend so much on on planes radios etc. but seem to always try to save a buck on the essentials that provide safety for our expenitures.
Ditto the carpet foam underlaymentg.. double wrapped works greats. Takes CA too.. you can make "boxes" out of it., etc. Being under carpet.. it's made to not compress to easily, somewhat dense, etc... but still soft. look behind a carpet store and you will find years worth !
Mike