On the spinnaker rig I bought the bale that the Inter boats use and have it on the mast, then above that I have a small cheek block so that is 8 rivets right there. Then the downhaul stuff, I have designed my own and all the blocks are mounted on the mast and it comes out to 6 rivets, I just counted. So 14 total.

I will just use the swept spreader mast, but should I worry about prebend?