Hey all, just installed a Smart Extruder+ on the Z18, it's printing better than new. Flat surfaces are smoother, curves are nice too (left print old extruder, right print new extruder in photo). Looks like they did a rebuild of the hot end alignment mechanism, no more metal plate on the bottom and zero side to side movement. They also added a new top entry guide, I can now print with the lid back on!

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