i will take a picture of the thin stip i use for balanced force. I use a ~3/4" strip of rubber on the side opposite the bow, so the bands push in the center as well as the sides. that way the limb profile doesnt "dish" i think marty uses some PVC trim. rubber is real easy for me because i have left overs when i make the bottom of the pressure strip and it does not need to be relieved to make the curves like the pvc does.