Large rugged drawer - Compatible with other boxes

Ive designed this draw unit to be compatible with my rugged box systemyou can either attach this unit above or below the other rugged boxes.you can attach TWO of my medium rugged boxes to either the top or bottom. there are 3 drawers one deep and two shallow all with an individual latch to stop them opening when you move it around. To assemble the drawer units you will need: 6x M3 Heat press inserts3x compression springs (0.5mm wire diameter, 5mm OD, 10mm free length) i used these off amazon (https://amzn.eu/d/cPYOD8R)4x M3 x12 Socket head screws16x M3 x10 Socket head screws2x M3 x30 socket head screws ASSEMBLE THE LATCHES BEFORE INSERTING THE DRAWERS To assemble the latches press the M3 Heat inserts into the holes in the drawers, once these have cooled down drop the latches into each drawer followed by a spring.for the two shallow drawers you will need the M3x12 screws and for the deep drawer you will need the M3x30 screws, ensure these are all tight.before inserting the drawers into