On 6/18/2020 9:17 AM, Mark Langford via KRnet wrote:
A hole saw is quite useful for this endeavor as well, unless you can
borrow an aircraft instrument panel punch from somebody (local EAA
chapter, perhaps). I used dumb hole saws and a drill press, although
just a drill works fine also. It goes pretty quick....
Make sure you pick the best method for the material used on the panel,
wood, metal, glass. One method may work better than others on different
material. I used what I think is called a "fly cutter" but man, that
thing can do nasty things if you're not careful. I would only consider
using one of those in a drill press with well clamped down material and
absolutely not with a hand drill. It worked for me but that's as far as
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