Brings back memories, I remember seeing my first drum solo played on a keyboard in the middle eighties, It was performed by Max Takana on Yamaha HX1 Electone, and if memory serves correct was done in the middle section of Tico Tico, Max also had the drums mapped to the pedal board, to allow more notes to be played, it truly was amazing.
Interestingly only a few Professional Organ keyboard players feature it today, but it still knocks me out.

Bill