Anyone know anything about Obsidian Optics?

I just saw this ad on ebay:
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=1370642245

Seems like a good deal. Anyone know much about the company?

The main thing that concerns me is the thickness ratio of the mirrors they have, 1:13.3 It appears they are limited by their choice of surplus porthole glass that is only 3/4" thick. A more conservative size for that thickness is a 6" mirror, and 8" at the most. One would need a superb mirror cell to addequately support a 10" with only 3/4" thickness.

Joplin

There's a Yahoo Group for Obsidian Optics customers.

http://groups.yahoo.com/group/obsidian_optics_mirrors/

It's free. Main issues are delivery dates and doing mirror cells to support OO's very thin mirrors.