Cable Spool Holder Gridfinity - Spool separator disc

When winding or unwinding spools, especially with 3 in the same module, I noticed that adjacent spools would turn. This simple disc prevents them affecting each other. Print flat at 0.2mm layer height. It'll be two layers thick at 0.4mm. You may need to be careful and use something to slide under it to get it off your print bed.