Building the first plane. I was wondering, so I don't screw up the engine cowling when I cut it for the first time, how do I measure/mark the hole that I need to cut on the cowling for the engine cylinder. I assume that I can make a template somehow.

Moral to the story, I don't want to screw it up by guessing where the hole and going to it with the drimmel tool. I thought that there might be a better way of doing it.

Thanks for any help