Overlapping multiboard: connect several into one

Version 3. A small improvement: all internal corner tiles have full diamonds. This version is fully compatible with version 2. IntroductionMultiboard panels are designed to be connected using large, intrusive connectors. These panels, on the other hand, can be screwed together to create one single large panel. This is a remix of the original panels. This is useful for several reasons:If you have a small printer (A1 mini) you can cover large sections without the waste of multiboard connectorsOf course, you don't need the multiboard connectors to connect panels to each otherThe larger panel can span over an empty area (thus you don't need a large printer to achieve the same). Reduces the number of holes you might need to make on the wall to mount it. You can place screws where you need them (you can use M2 to screw through the connecting bolts)They look nicerWarning (how to print):Make sure to orient the panels such that they don't need supports. This is already done in the B