Thanks for the encouragement guys. I think I will do it. I am moving house soon so hopefully I will have a shed to grind in. It will certainly be an interesting thing to attempt. The way I look at it is this, it will probably cost me $400-$500 to grind a 20" if I get a good deal on a blank.
Worst case scenario, I botch it beyond repair and I learn some very important lessons. So, basically, I have paid $400 to learn about the art of mirror grinding. If there was some kind of course that one could do to learn this, I would definately pay $500 to do it. Who knows, I may even get a large scope out of it.
