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[quote=randii][quote=ericrayl]My general plan is to epoxy a little threaded drain fitting into the mast, and also use it to pressurize the mast to find the leak(s).  Any thoughts or advice on that subject?[/quote]
Eric, I put a tire valve stem at the top of an alumnium mast I was rebuilding for my Hobie 18. There's plenty of meat in the masthead fitting to hold this, and it is very quick to check pressure... just take off the valve cap and depress the valve -- it'll suck in if cold and blow out if hot. No flow means you likely have a leak.

I've been told that it is unnecessary if I have a good, sealed mast... and it is probably overkill, but I like KNOWING for certain that I do have a sealed, watertight mast. It is also easier to find leaks with soap bubbles in my front yard than to wade into my girlfriend's pool!

FWIW, I have the Harbor Freight rivet gun that Bob referenced, and it is a snap to pull any rivet I've encountered. HF does a few things well, a lot of things adequately, and a moderate number of things poorly... the trick is to figure out which is which. Precision equipment I buy elsewhere.

Randii[/quote]

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