Yes, it's a pity they abandoned the module system. Korg Germany once answered me that the Kronos technology wouldn't fit in the M3 module size. I also have to admit that in the pic I shrinked the PA-4X top a bit, actually with the big touchscreen the module would have to be a bit larger than the M3 module. But there has to be a way to realize something like this...
I certainly still miss my M3 module. Many great brass/woodwinds sounds like this:
https://soundcloud.com/korg/s013-albondigas-ex1