Prusa MK4 horizontal spool holder

I wanted to place my printer on small wardrobe under wall mounted cabinet and with spool, it was too high, so I have designed horizontal spool holder. It is fully printable, if you are a bit of masochist to make 82 balls out of 246 tiny pieces as I did, but you could use BB toy gun balls, or any other 6-7 mm balls. It is a bit noisy, maybe increasing infill would make it more silent, I haven't tried, it is acceptable for me. Using steel balls would be best, if you know where to get them. Or use some lube, maybe? Paradox is, BB balls were more noisy for me, than custom made ones, weird. Print settings with modifiers and variable layer heights are in 3mf files, balls require 0.25 mm nozzle, everything else is made for 0.4 mm nozzle. Filament guide is designed to have PTFE from original guide inserted, but if works ok even without it.