Separate core and case - Medium and Extra sizes

I separated the “CASING” model of the V3 Cable Winder Medium and Extra size into its 2 parts. In my case, I used it in order to use the core model as an overlay setting modifier and set the core at 100% infill in Cura, having therefore not to use PrusaSlicer to divide the core and casing. I did it all in this Tinkercad Workspace, I'll leave a link to it in case you want to have a look at how I did it: https://www.tinkercad.com/things/cV8N6mkyGuQ