The glass I bought all have smoothed edges. I recommend that; they are pleasant to handle. All sheets are single strength 1/16 inch thick. They were all cut to one size, 1/16 less than the full measures of 8 & 1/2 x 15 & 12x15 and that worked. Some are a little loose here and there but they all went into the holders. Some of the holders are off measure. I'm glad I don't have to trim the holders. Loading the plate holders gets the glass off the work table. I need the room on the work bench. What I don't have is the acrylic sheeting, so other work may be done till it arrives.
One stripe of emulsion will be painted upon each size of glass for a stop wedge test of speed. That much I can do now. D-76 might work to develop it. We'll see.