This primary mirror cell was manufactured by Optical Supports (
http://www.opticalsupports.com/index.html ) and is designed to be able to accommodate both traditional and conical mirrors of up to 10" diameter. I have already modified a larger one to also accommodate a Dall-Kirkham. They are extremely light but strong.
See the manufacturer's data sheets for precise specs.
The manufacturer is currently out of stock so if you want one, this is your best bet.
New, they are US$230 plus postage etc.
I'll sell this one for A$200 plus postage in Oz.
Peter
