Silicate bag drying drum

I have a Sunlu S4 Filament dryer. I also have many smaller silica bags that are handy to stuff in the bags together with freshly dried filament. I designed this dryer drum for them that fits into a Bambulab filament spool that you can place into the Sunlu S4. It will probably fit other dryers as well, but I have only tried it out on the Sunlu S4. It might also fit other spools, if you test that: please leave a comment. Do NOT print this in PLA! PETG is most likely the best choice here.