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I have PowerSpec Ultra 3D (Flashforge Dreamer/Creator clone). I usually use PLA filament. Sometimes, PVA filament jammed inside the extruders and I had to take them apart. Will the all-metal hotend kit work?
http://www.amazon.com/Hotend-Nozzle-...A1D7NBXHNTHOV9
The all metal hotends are mostly made for high temp materials (>250°C). However, my print quality seems to have improved too since I installed one. Can't say why.
The all metal hotend shouldn't in itself help you with jamming. I suggest you diminish your retraction settings or up the temp a bit.