I made a little (~40g) MasterSpool, so that you can add the filament sticker and fix the inner end of the filament.
1.75mm and 2.85mm version available.

If you print the 2.85mm version, please tell me, if the hole sizes are correct (i only have 1.75mm)

original: https://www.thingiverse.com/thing:2791930
the MasterSpool-Project: https://www.thingiverse.com/thing:2769823