A Hole Saw of the exact size you need is fine if it is a new hole. Otherwise a jig saw would work.
John Oppenheimer <[EMAIL PROTECTED]> wrote: How does one cut a 3 1/2 inch instrument hole into a fiberglass bulkhead? It's a very common process but I've never seen it done. John C27 5956 Cool Change Austin, TX Change your thinking, change your life. We are guided, we are guarded, we are healed, we are blessed.....

