Spool guide rings for Eibos Polyphemus rollers

Got tired of spools jamming up against the bearing holders so I decided to give it a try with a minimal invasive procedure. Ended up printing rings from TPU that easily slide on the original rollers and provide enough guidance for the spools to keep them rolling through the drying cycle.

Simply slide them on the existing driving rollers with the chamfered side towards the middle and they should fit just fine.