Silent Wheels for the Prusa IKEA Lack Enclosure Adjustable Spool Holder

After having finished the Prusa Lack enclosure from https://www.prusaprinters.org/cheap-simple-3d-printer-enclosure/ I printed the adjustable spool holder from https://www.thingiverse.com/thing:2867521 which is a really clever idea for the lack enclosure.But the noise of the spools scratching on the non spinning wheels was a bit annoying. (see video on https://www.youtube.com/watch?v=qeYDtfeeHPA - the original wheel isn't moving)So I replaced the axles and the wheels by using a ball bearing (8x2