Your local glass man should be able to grind a 1/2mm of the edge. As for grinding your own, its quite easy, just get some silicone Carbide grit in 600 from your local lapidary store, and use a 100mm square glass tile as a grinding plate. Bit of water bit of grit and grind away. Should take all of 30...
My idea with the crock pot was a fizzer, to hot like 40degree C. I might try your idea with a fish tank heater and insulated water container you use camping which should help keep heat stable.
If the ambient temperature in the room is around 17-20degC the tray temperature should not drop quick enough to be a concern, I just like the fish heater idea so be interested to see how it goes. I'm thinking about cutting a old crock pot down so it only has a 50mm lip and see if that works on simme...
Yes I think Ive paid the price of a slab of beer for all 3 I have, pity the gear which moves the head up and down just broke....I was showing my wife why I like the Durst CE1000 better when the bloody thing broke, and she laughed.
Thank Walter, Ive just seen were the Durst Taucoli (cold cathode) is really only for graded papers (very blue) so Ill have to use the condenser enlarger. While the cold cathode one operates smoother, at least this one has glass negative carriers.
Setting up the darkroom I have two enlargers to choose from, one is a traditional lamp and diffused condensers and the other is a cold cathode source. Not sure which one to start using as the only enlarger I have used is the one at Melbourne CC and that's a diachronic colour head unit. I could test ...