Keep things in place on a 3/4" PVC pipe. I use these to keep my spools from wandering all over during a print job. I started with gsterley's Solidoodle Spool Holder Mk2, but now use them with my own. They keep a tight grip on the pipe but flex to accommodate variances in pipe diameter.
Print with 10% infill. I stopped the print on the second photo included so you could see the internal structure. You need two to hold a spool in place.
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