I,regularly, use my G70 and Nord Electro, and it works very well for my purposes, which is to assign a keyboard part to trigger a program in the Electro. This is rather straight forward, and even so, I have to trigger the program change from an existing program in the G70. If I was trying for ultimate control, like Diki says, I would encounter many obstacles.
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact