Cardboard spool core container system - Baseplates

Here is the base plate system for my Cardboard spool core container storage system. It allows combining several spool core cardboard boxes to be grouped together on a base plate to allow carrying or even stacking them. The system features both 2x1 and 2x2 base plates, for both the wider outside rim box bases and lids, as well as another profile for the narrower inside-only box bases and lids, so you have the freedom to pick whether you like the slightly stronger, but wider outside-edge boxes, or the narrower inside edge boxes. The base plates can be easily printed flat on the bed without supports. If you want to create multiple stacks of container groups, you can use the base plate coupler, which features ridges on top and below and allows stacking of base plates on top of a set of cardboard spool core containers. Couplers are available in both 2x1 and 2x2 configuration for both the outside and inside edge box sizes. Using base plates upside down to use them as dividers of a box for pe