radius gauges - need scaled up 25.4x

Needed some radius gauges bigger than 1/2" and those can get expensive. These print about 1/16" thick and can be modified for other radii. One of these scales up to 4.5" and the other to 5". There is a small hole in the corner to tie them together. I was going to make more, but these were the only two sizes I needed at the time. Maybe later.

2016-02-21 - added radius gauges for 0.75" and 0.625"