DUPLO compatible plate 2x2

A DUPLO compatible plate of size 2x2. The smallest plates that are available by LEGO (to my knowledge) are 4x2. The 2x2 plate comes in handy when building marble run systems.

There are a few 2x2 DUPLO plates online. Most of them use the original geometry made for injection moulding. I printed a few of them and was not satisfied with the clamping force to the underlaying bricks. 

This version of a 2x2 plate has optimized geometry for 3D printing and prints without supports. It gives a satisfying clamping force to the underlaying bricks.