Re: Drilling into mast & boom
As an alternate to pop rivets you might want to investigate rivnuts.
Rivnut Blind Fasteners Internal Thread Tubular Rivets
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"