Lots of great info in this thread thanks! Inspired me to start making my own gallery wrap frames after endless using/experimenting with purchased parts and kits that I was never quite satisfied with. Picked up an upholstery stapler and had everything else already. Home Depot select pine 1x2's (once you find a few straight ones!) seem to be the right size (nothing larger than 13"x24" for me) and easy to work with. They make 1.5 inch deep frames. Just finished mounting my first 4 canvas' last night and am very happy!
I put an 1/8 inch round on the edges the canvas touches with my table mounted router, cut a 15 degree bevel on the front and back sides, and used miter saw for cutting the angles. Sounds more complicated than it is, I made 8 small frames in an hour or two. Adds a little bit of pride knowing I did everything from take the shot/process/print/mount.