This is a router jig template so that you can use a flush trim bit to make a hole for your Magswitch. This was for a Magswitch 150, but may work with other versions as well.

It has small marks in the inside center so you can line up the jig for squareness. It also has 4 holes intended for screwing into your material, or you can use carpet tape for a cleaner look. Enjoy!