My hot end on my Sidewinder X1 stopped extruding filament after about a year of use. It randomly clogged instead of pushing through the threads (see first picture). It turned out that the PTFE tubing inside the hot end had deteriorated and collapsed, causing a clog. I replaced the hot end assembly with this one and tested it on the workbench and it worked AMAZING. Honestly the best bank I've ever printed! (see second picture)
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