Has the cardboard spool insert got a bit worn?

I drew up a printable replacement.
Insert fit is snug. Use two 3mm/4mm x 70mm screws to ensure the spool stays tight in use.

Recycle your spools and buy filament in bulk to save!

100mm od, 95mm id, 60mm wide
Final spool width with new insert ~69mm - 70mm

Printer:
MK3s+ Mod

Filament:
eSun PLA + 

Print time: 4-5 hours