A1 and mini side-mounted simplified spool holder

This design is relatively narrow, with an inner width of 65mm and an outer width of 81mm, fitting perfectly in front of the A1 mini Z-axis motor. For users with limited enclosure space, two 608-ZZ bearings are required. While printed bearings were tested, the smoothness of professional bearings remains unmatched. The four small supports within the tray are spares and do not require printing; omitting them prevents potential breakage of the spool's four clamps. A month of testing confirms sufficient strength. This design is ideal for spools with smaller mounting holes.