Horizontal Spool holder

I got an original Prusa Printer with multi material upgrade, When i built my enclosure I made a shelf under the printer for the filament. spools of plastic can get heavy especially four of them at once, I also figured that extra weight underneath the printer might help knock out the vibration noise that this printer makes. to be able to fit all four spools on the shelf the holder needed to be flat, first i tried sandwiching BBs(making a giant ball bearing but that was way to loud, so i designed