Simple alteration to Humebeam's brilliant model for a Silica Gel holder AND Hygrometer to build into a spool itself. This enlarges the flange so it fits onto larger holed spools, like the Sunlu ones many of us find ourselves with.
The rest of the holder remains unchanged, unlike the other ‘Sunlu versions’ which are just scaled copies, which not only means it will comfortably fit the smaller Bambu spools too, but also it will still take a Hygrometer.
Print as per the print profile in PETG or ABS/ASA for longevity+the ability to go in a dryer, or PLA will hold up fine in the AMS.