I did use both layers of foam. I did not however glue/tape them in any way. I'll bet that was the problem, but I've never seen a tire insert that wasn't circular to begin with. The way they come in "strip form" is not a good idea. I should have bought some regular inserts.
I'll get the Moabs and these
http://www3.towerhobbies.com/cgi-bin...?&I=LXLUZ8&P=7. Now onto the wheels. Does anyone know if there are 1/8 buggy beadlock wheels? I really hate gluing...yeah I know,