Originally Posted by bljones
center drilling and collapsing STAINLESS bolts without damaging the softer aluminum around it is going to be tough for a DIY job.
Some pics would be a big help-
Sorry, I have no pics. It was a tedious process. I was removing ss machine screw stubs from my pedestal on the mooring with a hand held drill. I managed. Swearing at the dopes who don't understand "No Wake", helped. The ss I was dealing with may not have been as hard as the bolts you are removing. You should be able to jig up in a drill press. My "small punch" was an awl.