Compliant Spool Holder

It seems like the only way of having a spool holder with bearings is to either have to deal with clips to hold it in place which keep slipping, nuts which take forever to take out or having to waste many hours of print time for proper threaded ones.
So i came up with this. Optimized for minimum print time and material use, this is the exactly what i was looking for. The compliant arms stretch out to grip the rim of the spool making it super compact and great for long spool racks.
Low clip profile prevents snagging.

Designed for spools with inner diameter of ~55mm and outer diameter of ~200mm.
Fits 608ZZ bearings and an 8mm threaded rod.