Got tired of Plano 3700 Boxes laying horizontally in the box I use for my kayak. If you need the bottom one, it's a pain to drag out without everything on top sliding out. I have a collection of DeWalt TStak boxes I use in the garage, and a Plano 3700 fits perfectly upright/vertically, and I can add secondary boxes or drawers. Only downside so far is the color, the black will heat up quick in the sun. Had to add a divider. Cutting Board/Plastic would be ideal, but I don't have any around. I added holes for weight reduction but made them too big IMO. Spools and such fall through it. I'll make another if it's an issue.