Customisable anti-curl cuboid base plate #2

This is a second proof of concept for a plinth to mount 3D models that is mostly cuboid in shape, but should be much less prone to curling up at the corners.

This is particularly an issue when printing cuboids, which can make printing a model of a building challenging.

The idea is simple: to reduce the length of any straight sections, where the force exerted by cooling and contracting filament can build up, which is most extreme at the corners and in the first few layers.

It's a customi