Ender 3 Hot End Fix Spacer with tube guide
thingiverse
I encountered difficulties with the original spacer, due to the short tube inside the hot end not aligning properly with the center hole, which had a slight curve. The exact same spacer was used, but with a 1mm deep guiding channel for the tube. To accommodate this, the short tube for the hot end needed to be trimmed to a length of 32.2 to 32.4mm. This modification has proven successful so far during attempts at TPU printing, as it eliminated clogging issues that previously plagued every attempt.
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