Replaced a worn 0.4mm Creality nozzle with the one that came with my printer. At the same time I changed the PLA to another color. Thought the PLA was in trouble. Doesn't stick, doesn't print, etc. When I went back to the famous PLA and it did the same thing, I knew it was under-extrusion issues at the hot end. Didn't you know I had a bad 0.4mm nozzle? which I learned by replacing it with a 0.4mm Luter nozzle. BAM prints normally again. It is very practical that Luter packs the nozzles individually in the kit depending on their size AND stamps the size on the side of the nozzle. I have found my new nozzle supplier. I don't have any calibers or would double check the jets I received but judging by other reviews and my most recent prints they are top notch.
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