yup, about 220 grit (what I had on hand), and a little double sided tape. Had to laugh at myself, I made the first four for the pictures, then forgot to make the other four. Did that yesterday, so now I have the full set. I also added four more of the small, 4 inch Bessy bar clamps to make a set of 8. These are smaller than the ones shown, so they stay out of the way. I use the larger Bessy clamp to pull the corners together. My wife has a backlog of paintings that need frames, so the pressure is on to get busy. Bought some pine stock yesterday so I can mill it. Not as fine looking as hardwoods, but it's about 1 inch thick and mills nicely for most of her usual paintings. These little jigs work best on thicker frames.
The more I do, the less I accomplish.