This is a caddy to carry a spare spool of trimmer line on a Worx string trimmer.  It should be printed from TPU to allow a spool to be pressed on & removed easily.  Attach to trimmer shaft with either zip tie or velcro strap.

I used 2 top/bottom layers & 2 walls with 20% infill.  The worx spool has a smaller inner diameter at the top than the bottom.  The caddy is sized to accomodate the spool being attached with the bottom (larger) side down.