my arca swiss 85mm extension bracket( a small unit which supports the rail and t o which one mounts onto a tripod head) had small strips of teflon running the le ngth of the bracket to take up any slack and to allow the rail to smoothly slide into it, has lost its adhension and i have been substituting various types of t ape which has been unsatisfactory. has any one run across this same problem and do you have suggestions for either obtaining the same type of teflon tape?? or other suggestions thank you