[ATM] Back of my blank

[atmlist at ct-astronomer.com (Shane LaPierre)]

Thanks all for your responses.  My mirror blank is about 1 
1/2" thick pyrex for a non-flex parabaloidal mirror.  I 
can actually see some irregularities in the surface on the 
back amounting to a couple of tenths of an inch probably. 
 I could probably work this mirror fine without messing 
with it from your posts.

I worked an 8" blank that was molded concave by Richard 
Schwartz and the back was convex.  It came out fine, but I 
did have to work it on some towels if I recall.

Thanks,
Shane LaPierre
http://www.ct-astronomer.com