Spool weighting for geeetech

If the spool is nearly empty, the CFS didn't retract my pool anymore.So I created these to fill it with old screws or something else.After weighting th spools the CFS retracted the almost empty spools just fine.I filled them with old screws that I had lying around, but other materials are also possible.I Printed these with my K2 and PLA with standard print settings of Creality Print 6.0