Troy Petteway kept having trouble with spun spinners cracking. I have one of his rejects. They were never balanced correctly, and these were high dollar ones. He finally made a mold off a new one, then made a carbon fiber spnner from the mold. He's had no trouble since, and I don't think he even has a forward bulkhead on his. It's an option...
Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net