I have both and AMS2 feeding the primary nozzle, and a AMSHT feeding the secondary. I want the option of occasionally feeding filament to the secondary from an external polybox (I store opened, individual spools in them). Wondering if I should simply use one of the Bambu 4->1 adapters and put it before the aux extruder motor input, and leave a length of PTFE that I could manually feed external filament into. Or is there a better way that I’m not thinking of?
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Not tried it myself yet, but that would be my aproach, too.