I've now sorted out a furnace and most of the associated kit. However I have no casting boxes (flasks/ cope&drag/ whatever). I could make some wooden ones cheaply but can't help thinking that there must be a bloodly great mountain of the proper metal ones somewhere - after all every school must have had about 25 sets to a single furnace. Some dealers list them but at £30 it's worth making them instead. Anyone know of a cheap source?
Thanks
Charles
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