For simplicity and compactness, I chose to control everything from the SD40 so I can use a very slim keyboard controller. I haven't investigated the SD40's midi implementation with controllers. AJ can help us on that.

Ketron SD90, Ketron Midjay Pro, Korg Pa1000,TC Helicon Play Electric, Fender Sonoran Guitar, vArranger, Bose L1 Compact, Roland KC-110, Aiwa Exos-9