Reminder here to use the proper tools, especially for those people who are looking for cheap ways to do things. I had some of these spring clamps that were like 99 cents at the home depot, and was using about 15 of them to glue on a back to a blank, using them for the edge. I have two purpose made clamps I use to press on the center. I bought these clamps because they were cheaper and easier to use then C-clamps, and it seemed like they would work just as well. I was wrong. Not only was I wrong, but really, I knew better than this, and felt like an idiot when I had a gap around the top edge of my back after trimming it all up with a flush cut router bit. I knew better than to use shortcuts, I eally did, and felt like a complete idiot afterwards. But, as Hambone put it, you screw it to the wall as a reminder... This cost me a big chunk of mahogany, which is running about ten bucks or so a foot these days, and a bookmatched back of crazy figured looking mahogany, along with some walnut veneer, all said and done, probably about 60-70 bucks worth of wood. So for everyone looking for the cheap and easy shortcut way of doing things, hope you have plenty of wall space.