3d Solutech Spool Hub For 1/2" PVC

I used the parent project's openscad to generate a version of this spool hub for the solutech 3d spools.

The tight is fit, but that is on purpose. I made them shorter but tighter fitting to decrease print time.

There is a 1mm gap or so on the pvc to ensure that the pvc rod does not turn, just the spool.