Tackle tray insert

A drop-in tray with a grid of slots that keeps small fly boxes and lure trays from sliding around inside a tackle box. Measure the inside of your box, set the length and width, and pick how many slots you want across and along; the walls, floor and finger notches are yours to adjust too. Sized for a Plano 3600 StowAway out of the box, prints flat with no supports, and can split into two identical halves for a smaller printer.