50mm Spool Arbors for Lack MMU2s using 608Z bearings

Stops the metal spindle from falling out! A 50mm standard Arbor that fits the Prusement spools I remixed for the Lack Enclosure V2 Spool holder. The arbors have a space for standard 608Z bearings which currently come with the MMU2S. They need support enforces for the bottom to print correctly. Many thanks to Stephen for supplying .step file Print instructions I printed these in 0.20mm Quality setting in PETG with a support enforcer on the lower bearing hole.