>Never mind all that, just how big a scope are you making??? > >George Anderson >Montreal Canada Not as big as I'd like....;) Last one was 32" with 4" thick Zerodur primary... Andy Saulietis ISS Enterprises 39 Silver Fox Trail Mayhill NM 88339 505-687-3067 voice 505-687-3021 fax, call voice or e-mail to set up e-mail: iss@pvtnetworks.net