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Budget Rule
(lemmy.blahaj.zone)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
An obsidian 3d print is less crazy than you might think. It's essentially rapidly cooled lava.
Need something to hold the lava, then pressurize it to squeeze it through a nozzle that that has attached cooling units.
I think you just described a volcano.
We're in luck! They already sell that nozzle!
Simple: bucket of lava, bucket of water, repeat.
Grabs a bucket. Quick, to the lava depository!
Using a planet for a 3d printer's nozzle still sounds pretty crazy.