ORIGINAL: ro347
Chuck...ive seen your user id somewhere before...do you have an Aeroworks edge?
Nope, no Aeroworks Edge. I really like the new 50cc version they are releasing though so I may end up with that.
ORIGINAL: MinnFlyer
Mark the mounting holes on a piece of paper.
Find center by drawing a line from corner to corner.
Put a pin in the center and rotate the paper 90 degrees.
Mark your new hole locations.
Good idea. One reason I really like the GP adjustable mounts is that they come with a mounting template. Just place it in the center lines and mark the holes.
I also tried another method recently and I was very pleased with it. Rather than using a paper template, I made one from thin plywood. I tacked the ply template on the firewall with a couple small drops of CA. This way the template didn't move and I was able to mark the holes on the firewall very accurately. Then just pop the template off and drill the firewall to the correct size for the blind nuts or bolts. Now that I have the wood template, I just drilled a larger hole in it and hung it on the pegboard in my garage and marked what it was. If I ever use that same engine on something else, I have the template ready to go.