Nice gaskets Louis! I've been making my own gaskets for a long time,
but never to old to learn new tricks or of a new tool.
A couple of years ago I got a set of transfer punches.
Great tools for the spots you can use them.
They perfectly mark the center of a flange hole, etc.
After marked, I then use a transfer punch as a "pilot"
for my hole punches, so the holes are spot on where
I need them.