Spool Holder Plug

After printing a mirrored pair of spool holders from Prusa, I noticed that there was a hole through the holders that would allow a rod to be passed through. So i grabbed a spare rod from my printer parts and printed a plug that holds the rod inside. 

This allows for a third spot for filament (albeit a bit harder to swap) that also accommodates spools with smaller inner diameters that wont otherwise fit on the spool holders designed by prusa. Also great for cardboard spools that may have a bit of friction against the spool holder, against the rod it has much less friction.

Printed with a very flexible TPU. May have to play with the scale of the print depending on your filaments flexibility in order to get it to fit snugly.