This isn't a comment. It is a question. I need to grind 3 pieces of glass to the same specifications. I know that they can be stacked together. However, I have yet to find any adhesive that will hold them. Double stick tape, rubber cement, silicone gleus/adhesives, even super glue has not worked for me. I am trying to make 3 separate irises. The petals for the glass is slightly rough on one side and smooth on the other. The flowers are going to be set in one window panel. I am grinding these on an 'Inland' grinder with a 1 inch bit. Any, ANY help you can give me would be so appreciated. Thank you - - - Joseph