I don't know if any of you belong to the atm list server in the USA, atmlist.net, but there has been a flurry of postings about ultrathin glass projects from around the world. Included are some really nasty ronchi pics of my 406mm project. I need to go back and clean it up when it comes back from back east.
Some good arguments out there and lots of discussion.
I been away to long, sorry
David Davis
Toledo, Oregon 97391