Be cautious about using the upper section of winsurfing masts, even carbon. I was using about 12 to 13 feet on 18' cats, measured from the orginal, full diameter base, cutting the excess off the upper skinnier end, and that works fine. But when I started pushing 14' on the SC20, I snapped 3 windsurf masts near the tip before going to something else.

Dave 509 276 6355