Tom, I just finished making two sets of single Vchamps yesterday. One set for me and one for my son. Then I check the RF an here is the set of doubles from Woodpecker. The pic they show is using three clamps, that is pretty expensive. I made mine from some strips of pine that I had left over form making some frames for my wife. I tried them out on some scrap pieces of frame and they worked great. If your miters are good it does't take a lot if pressure. Of course you have a guillotine so no problem. I'm sure Woodpecker hope you will buy their quick clamps also, but any ones quick clamps will work.