On Mon, 25 Jul 2011 21:14:29 -0400 Carl Denk wrote: > My guess is the Dremel will not cut glass, but that thin glass will=20 > shatter, at least locally. Hi Carl, Actually, both. I've been quite amazed at the tiny cutting disks of the machine. I first cut through the glass to let the air in... No shattering at all. Cutting slightly deeper broke the glass neatly all around and produced the result of the pix. Though I appreciate all the suggestions, I'm not about to make this tube-cutting activity a business. This was just an educational experiment. John --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .