Posted 10/24/2006 09:20 (#54732 - in reply to #54722) Subject: Re: Aluminum fabrication question
NESD
Obviously the best way would be in a lathe but since you don't have one I would start by centering and marking out the bolt circle, drill the holes and a starter hole in the center, then use a jig saw and cut it out, use a course half round file to finish.