The problem regarding life span of rubber grips is the materials used are only moderately oil resistant. Its a trade off. The more oil resistant the harder and less tackiness. So the very thin/cheap ones can't absorb as much oil (from your hand) and get softer quicker. The surgical tubing mentioned since its cheap is a nice option although Natural Rubber is very low in oil resistance. But very tacky and abrasion resistant. Really tough stuff.
As far as loading the butt in a case its not easy. This is one of the main reasons the butterfly style cases are popular in 3C. My case is a Whitten. He used his shaft liner in the butt tubes rather than the fuzzy stuff.
As far as loading the butt in a case its not easy. This is one of the main reasons the butterfly style cases are popular in 3C. My case is a Whitten. He used his shaft liner in the butt tubes rather than the fuzzy stuff.