Seed bead sorter (8/11/15)

A three-tray stacking sorter for seed beads in sizes 8/0, 11/0, and 15/0. The top tray's 2.6 mm holes retain size 8 beads while passing smaller sizes; the middle tray's 1.8 mm holes keep size 11 beads and pass size 15; the solid bottom tray catches the finest beads. Each tray features a 45-degree flared lip that self-centers the stack and eliminates overhangs for reliable FDM printing. Tray height, outer radius, wall thickness, and sieve hole diameters are all adjustable.