2020 Aluminum T-slot and V-slot cross-brackets

This is designed to allow for extrusion configurations that normal hardware doesn't allow. Regular 90 degree brackets for extrusion normally only allow for connections where each extrusion groove operates in the same as the other. This piece allows you to cross your beams now instead (Don't cross the streams? HA) to free up your options, making it much easier to lay extrusions across each-other.

This was tested on 3-channel (60mm) extrusions to build a gantry for a Farmbot: the designs for t