Hmm looks like no one has any comments about hopper thickness
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I’ve used from 0,6mm up to 1,2mm , what i had on hand.
Only needs to be stiff enough to not collapse under vacuum.
Some very thin gauge barrels/drums will rust through fast, until only the paint keeps them together.
For heat transfer i don’t think the thickness affects much, if stationary better use thick, and forced cooling.
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Thank you for the insite mate
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