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Thanks guys and thanks Mark too. I just started reading up on the test you describe and I will certainly be trying that. In fact I will be trying everything that comes my way. Joe I get my grit from my local astronomy club ASV. I have also bought grit from telescopes and astronomy in South Australia. Google telescopes and astronomy, click on the result,scroll down and click on Dobsonian Making and Information & Home Telescope Building,click on 3 Home Construction and scroll down until you find the what you need(I find the web site a little difficult to navigate). The prices are reasonable as you only need one bag of each grit and they deliver pretty quickly too. I don't know what the pitch they sell is like but Garyh purchased some pitch from somewhere and he managed to finish a mirror successfully. You might try asking him about the pitch. I know burgundy pitch is the favoured one but I think you can only get it from overseas. Joe a bit of advise about the 10 incher. When you make a new tile tool make sure the plaster is the shape of the mirror, before you set new tiles on it. I made the mistake of not doing this and it took me ages to work the tiles to the shape of the mirror . I wasted a lot of time. If you want I can tell you how I added plaster to the existing tool and it didn't come off.
Regards Cristian
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