Grodan 4x4 Rockwool Cube Drainer

A simple drainer for Grodan (or any other) 4x4 rockwool cubes that allows all water to drain out of the bottom of the cube, so that any excess water doesn't lead to damping off of your seedling. 

It also prevents the taproot from being damaged when handling the cubes.

Update: The first version was a bit too low for my needs, so i increased the height a bit to create larger channels..

Update 2: I created a slightly modified version that includes a 1 layer * 2 lines (0,2mm * 0,4mm) strip between the feet to keep all of them in place during the print. This allows you to print the model faster and only requires minimal post-processing (or you can just leave them attached).