Agree, change the bolt out to a pin, or at least a bolt that comes as close to filling the holes as possble, and keep all the threads outside of the fittings.

Boom end is very different from mine, both the my Triton and Ariel have the same worm gear type roller setup. (except for being a foot or so longer and the outhaul, the triton's boom is identical to the Ariels)

ken.