Re: Drilling into mast & boom
As an alternate to pop rivets you might want to investigate rivnuts.
Rivnut Blind Fasteners Internal Thread Tubular Rivets
1984 Fast/Nicholson 345 "FastForward"
".. 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)