A rocket motor storage box for standard Estes type 18mm diameter or 13mm diameter motors. The top features a storage area. I wanted a single box that would allow me to carry engines, wadding, and igniters. You can turn this into multiple boxes by rotating and submerging the lid. You can see an example of this in the 13mm box in the photos. If you print the top as a single piece, it does use a fair amount of support to print the floating floor. I minimized the support in Simplify 3d by using a 10% support density with a 10 layer 30% dense support layer. Even so, about 70g of plastic is wasted.