These combine a carry handle and spool holder for the Solidoodle 3 into a single unit, one left and one right, which makes moving the S3 much simpler.
I had previously printed gsterley's Solidoodle Spool Holder Mk2 (thing:97734) and fredhag's wire guide (thing:94675) but needing to carry my S3 around prompted me to create these with the wire guide included.
Use a section of 3/4" PVC for the spool holder and my tension nuts.