Who did you use for the hinges pls? My preferred suppliers feel pricey & don't have many optionsI decided to bite the hinge and get some bigger bullets...
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Insulating fire bricks for scale
The smaller bullet hinges will probably still be useful: rather than being sensible and buying a "project box" for the control cabinet for the heat treatment oven, I'm currently planning on making something from scratch. The big hinges will be good for the (relatively heavy) chamber door, but the control cabinet door is likely to be a lot lighter and so I can use the little ones.