Since Bambu Labs AMS doesnt like cardboard filament and will cause it to break over time, This Rim cover will make it smooth and very simple to put on. Snap on, should be a tight fit , meant for 198mm spools but if the cardboard is slightly bigger just scale in the slicer by .5 for every 1mm larger, very simple and easy to use. Infill doesnt matter its very thin so it saves on filament and time. Only takes 9 minutes to print not including set up time.