probably-Erwins-Cat

I practically have a stackable prototype of your suggestion already laying around in FreeCAD. Unfortunately, the whole thing is a little bit more complicated since a few things have to...

The 350mm requires only 4 turns with optimise tube length of approx 860mm. If there are tangles, there are buffer shields so the filament does not escape the buffer wheel....

the fila shield is attached with the small addons Fila Shield Connector and pressed-in magnets (the standard 6mm diameter magnets).

Shameless commenting here that your issue might be mine in disguise: https://github.com/VoronDesign/Voron-0/issues/340.