<p>This is an adapter for IRobertI's low friction spool holder (UM2), to mount it on an UMO. I recommend at least 30% infill and 0.8mm walls.<br><br><a rel="nofollow" target="_blank" href="https://www.youmagine.com/designs/low-friction-um2-spoolholder">https://www.youmagine.com/designs/low-friction-um2-spoolholder</a><br><br>the 608 version is untested!</p>
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