Re: Wow, leather is tough, gaskets suggestions needed.
another easy way to make the bolt holes in a gasket is with a bolt and a hammer.
if you look at the tip of a bolt, it's usually got a little dimple in it. find one slightly larger than the size hole you need, put your gasket on smooth concrete, or metal (like the flat side on a vice) put the bolt where you need a hole, and give it a few whacks with a hammer.
you should be able to pop the little circles right out.
for the port-hole, take a piece of masking tape and stick it over the intake, then rub it with your dirty finger to make a tracing, put the tape loosely on your gasket, and cut it out with a razor knife or an exacto.