This is a spool adapter for carboard Overture rolls, to allow them to be used in the Bambu AMS. I designed this one to be used after pulling off the carboard sides of the original roll. The carboard center of the original roll will remain intact. The female thread side of the adapter has gaps in the center hub to allow the center filament tail to still be free. I tried an adapter that fit around the original roll and found it to be too bulky for the AMS. Therefore, I designed this one to reduce the width of the roll.