Join Date: Jul 2006
Location: San Diego
Thanked 44 Times in 38 Posts
Rep Power: 13
Maybe put a small piece of plywood over hole and fasten with screws then use hole saw?
I would try this
Which side to drill from so it does not wreck the gelcoat?
from outside in just enough to start the new hole, then remove the ply backer and finish it off
1955 Blanchard 51 Custom ( I got a woody )
1974 Ranger 33
Friends don't let friends do stupid things alone