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Sounds like you could do with a larger power supply, amp wise. Mine is a 30 amp supply and it gets the bed to 110 C in a couple minutes. Unless his supply is crowbarring or cutting out, he needs more volts, not amps. Whether he's got an 12v 8A supply or 12v 30A supply, if the heater only draws 6A, ...

Sounds like you could do with a larger power supply, amp wise. Mine is a 30 amp supply and it gets the bed to 110 C in a couple minutes. Unless his supply is crowbarring or cutting out, he needs more volts, not amps. Whether he's got an 12v 8A supply or 12v 30A supply, if the heater only draws 6A, ...

Open SCAD is an interesting beast. It's great for those of us who are less visual and more numbers/programming.
I still haven't really made a useful model in it yet.
(I'm also trying to learn 123D simultaneously)

Circuit board manufacturers already use a similar process for through-hole plating. There is copper on both sides of the board, but when they need copper in the holes they've drilled, they have to activate the holes before plating. I don't think it would be too practical to do a whole board this way...