Use this jig to center and round out the center of the iris compass circle drawing tool. This made assembly go from irritating to slightly less irritating, but still tedious.

The reason it's so tall is so that the leaves do not accidentally cross over and make the whole thing go out of whack. You can stop the print early or break off the top if you want, but this is ultimately a tool you will use once, so it doesn't have to look pretty.

The smooth transition between the flat surface and rod make it much stronger and reduces the likelihood of it snapping off.