David Clites
Active member
I am reglassing the stringers in my 1986 Higbee BBSB. I want to enlarge the drainage holes in the stringers before I apply epoxy and cloth. It is a tight fit getting my reciprocating saw in there, keyhole saw is not much better. Existing holes are approximately 1/2 inch. If I go to a larger Twist Drill bit on some of the holes I would risk partially drilling through bottom of the hull. I will be drilling through not only plywood but also old fibreglass. Any tips on how to enlarge these holes ? (Which do not necessarily need to be round). View attachment IMG_20210824_092530.jpg