20x20 Extrusion Mount & Tool/BuildPlate Holders

I needed an easy and universal way to mount tools to the outside of my enclosure for my printer. I also didn't want to deal with the permanence of drilled holes for each individual holder should I decide to move the tools around, so I made a bracket for a 20mmx20mm aluminum extrusion I had left over and used some M3 T-nuts to mount various tool/buildplate holders to it. Both buildplate holders are adjustable, although they are designed around a 235x235mm size plate. the model can be stretched