Router Jig

This is the router jig I made to cut the circles.
It's made of 1/4 styrene and you can see in the pictures how I bolted
it to the router.
I also have marked holes in the plate for a pin to keep it in place while
we slide it around on top of the 3mm Styrene.
I made the 1st cut with the R9 hole which is a ruff cut and then
I use the 9 hole for the finish cut.
This gives me a smooth cut all around the 3mm circle.