I created this little tool so when I was modeling I could remember what the radius was suppose to be when I needed to embed nuts. Mostly this was a test thing to upload but someone else might find it useful.

To get the black on clear plexi-glass look. I left the protective cover on the plexi-glass. After etching and cutting was done I spray painted black over the whole part. Let it try and then removed the protective cover. I used a small hobby exacto knife for the little bits of letters.