Router Throat Plate

This is a throat plate for a table router insert. I believe the insert I have is from Sears, but I'm not 100% sure. I think it's a standard size, as it works in my friends Rockler insert also. I had a hell of a time locating one, and when I did they were stupidly expensive for a small disc of plastic. So I designed this one. I just printed a bunch. Whenever I use a new bit I can just run the bit slowly through the plate to get an exact cut at 0 clearance. I was worried that the heat would melt t