Now that i am a big piece forward I am facing a little problem. The two boards are quite large and the way the connectors are done it is impossible to put it in the base of a kossel (except when I give up height and make a much deeper base). The only options I see are either an external box with boards backt to back and push-pull fans in between. Or place them flat (next to each other) in the top of the printer.
For the latter I would need a shorter ribbon cable though.