I'd personally take out the marbles, the plaits and at least one of the distings (the screen on the MK4 sucks, but also having effectively three of them with the dual disting ex is going to be boring). In their place I'd try to fit modulation (maybe quadrax which is a lot packed into one package, or tilt, ochd, a clone of peaks for more compact options), an interesting oscillator (maybe twin waves), a filter to suit your taste, and hopefully there is room for a few vcas (maybe veils or a clone)