Bambu filament winder / spooler updates (axle, guide, centering disks)

Needed stuff, made stuff. I have couple of spools slightly over 70mm width that didn't fit with the original axle so slimmed the stoppers down. Axle is basically remodeled in OpenSCAD since I couldn't mod the original STL. Also the filament guide in the remix-thing had 3mm quide holes although the screws are 4mm so fixed this. Also made the guide holes longer. OpenSCAD source here: https://github.com/spegelius/3DModels/tree/master/Bambu_filament_winder_spooler_remix