Spinning spool holder for Makerbot Replicator 2/2x

Spool holder with spinning body, tested after four prototypes and this one is fine. I made 2 versions (left/right) to prevent cap unscrewing by spool rotation, so the right cap thread is normal and left cap thread is reversed.
Fit with all kind of spools.
Hope will be useful.

Printed using PLA at 210°C, layer 0.2, raft and supports only for the main body (L/R)
Infill 25%
3 Shells

In order to get a better "lower friction" feeling, i used a bit o silicon oil spray over internal shaft.