After cutting the template out from the plans I properly aligned it on the F772 skin and drew an outline. I. Did two different methods on either side to see which was easier. The first was to drill a single large hole and then use my dremel to cut around the outline to the second large hole. The second method was to use a step drill in the center until I got a hole close to the edges of the outline then use my Dremel to clean up the football shaped hole. I can confirm that for me at least, the second method was the easiest and worked the best.
Getting these weldmants to fit in the skin without interference took several iterations of off,on,off,on, but finally I got it and it actually turned out nicely.
Also I had to sand away a bit of the F704 flange. Be aware that there will definitely be edge distance issues with a hole on the skin and 704, but don't worry, this is apparently very normal and expected on the 7A. 5/8” hole drilled for brake line as well.
Oh and I had to stick a gear leg on just to see haha.