[quote=rattlenhum]Yup....folks who are replacing that sheave and some who install bobs are just using a SS bolt. The masthead is in compression and open to the inside of the mast (can't be sealed), so it shouldn't be a problem if it's just a little loose. If you do decide to repair, I'd replace existing rivets rather than drilling new holes. (You can drill new holes after you knock the head off when you drop the mast while trying to raise it without the hinge per your other thread!)
If you do remove the existing rivets, I'd recommend that you take the head all the way off and inspect/clean/reseal the foam plug that should be just (a few inches?) below the top of the extrusion. That plug is important since the head can't be sealed as described above.[/quote]
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