 Hello, and welcome to the shop. I'm going to show you today in the first of these five videos about techniques for cutting and installing speakers, a technique that I use to quickly cut styrene to shape. First I find which side is square by seeing which rocks on the cutter, and then I cut against a fence that I've installed. Since this is fairly thin material, it's not going to cut terribly straight. Thicker material will cut better, and I wind up with one square edge and one not so square edge. But I can work with that. Now on the chopper I'm going to re-identify which edge is square, put the square edge against the edge, and cut just a little bit off the end so that I know that I've got a square cut there. And then I'm going to cut to about an inch and three-eighths long just so that I have a piece that will be smaller than the blade in the chopper. Now I'm going to cut this to a final dimension that is the width of the shell. First I use the inside jaws on the caliper to measure the shell, and the protrusion piece at the end will stick out exactly the same amount. So when I have a nice sliding fit, I lock the calipers, check the dimension again, and then I'm going to transfer that dimension to the chopper using the chopper fence. Now I'm going to bring the razor blade down just lightly on the calipers right against the edge, and then I'm going to bring the fence in place and lock it down. Now the dimension between the blade and the fence is what I want. I'm going to take the square edge of the piece, put it up against the fence, and cut it. Now I have a piece that's about an inch and three-eighths long and the proper width for the shell. Very quickly done. Now I can cut as many pieces I want shell width.