Jake,
Thanks, I'll look into the bolts more tomorrow.

Carl was talking about a rear crossbar mounted spin, and interestingly enough, advised on the spin I've been using.
I guess Carl thought that was why one of my crossbar bolts failed.

Jake, you been around for awhile, and If you thought about it, you'd realize that my spin does not sheet to the rear beam. The first block, a Harkey Ratchamatic, is on the shroud base, via a shackle.