For all those who offered suggestions or had questions of their own regarding half-darkslides when I posted a query recently, here's the results from my homemade half-darkslide. If you want to make one for yourself, simply draw diagonal lines from corner to corner on a darkslide to determine the center. (If you leave the slide a little fatter than half-sized, you'll end up with a larger seam between images.) Make sure you leave part of the slide intact up to the handle, making the missing slide portion only that which enters the exposed film area. Then score with a sharp knife and go back and forth until you slice through and put a deep gash in your leg. (Okay, maybe don't do that last part.) To use it, I always compose on the bottom half of the ground glass (or left half when doing verticals), and shoot with the darkslide over the top half. For the second exposure, I flip/rotate the camera back 180 degrees and do the same thing, always composing on the bottom or left half and darksliding the opposite half. It's a lot of fun!