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Hi Cambo
Yes that was what I was refering to when I said " the glass not being flat when heated "
The onxy is the main problem, hence the steel plate that it cannot bend

Well so far so good. All the prints are staying stuck to the plate, no curling up at the edges, and I am printing to the edge of the plate. It took 5 mins to heat up to 60 deg, but couldnt get it up to 100 deg. Maybe need to try with 24 V. or enclose the chamber. Will have to look into that when I ...

Hi All I though I would just share what could be an alternative to the glass print bed. I was having alot of trouble with the glass not being flat when heated, so had a thought about what I could use that would stay reasonably flat when heated. Well I just happen to have some 8mm thick mild steel ...

Now thats the ducks nuts..!!