I've got Skybolt's that I may or may not use on my cowling. My idea is if I do, I will fabricate a final size drill guide out of 1" x 3" x 1/8" steel, heat/oil harden it, then locate it and attach to the cowling with two way carpet tape and a couple spring clamps. Sneak up on the final hole size and finish it with a final size reamer. After I have that hole done, warm the steel up a little with a heat gun and with a putty knife remove it. Clean off used tape and adhesive, repeat. For curved surfaces, trace out the hole with an ultra fine tip pen, get close to the line with drill and carbide burr in a Dremel, then finish with a reamer if needed.
I used to use a pair of loop glasses I borrowed from a friend who is a dentist for close up work.
I found these magnifier glasses from HF at $4.99 to be far easier to use and worked just as good. I use these quite often for close up work, especially wiring.
RV-10: #41686 Under Construction/Sold 2021
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2021
Last edited by 9GT : 01-26-2022 at 07:01 AM.