Modular Cinder Block

This is a modular cinder block for putting stuff on. The blocks are designed to slot together in the width and length dimensions.

There are grooves for wires. These can be used to tie together multiple blocks, or to tie the blocks to whatever is placed on them.

I haven't determined the exact tolerances of the blocks, but 4 of them with the recommended print settings can support a 100kg box without problems.