Scott,
After reading all that has been written I feel you are heading the wrong way on a one-way street. But--- it is possible that you might come up with some ideas the rest of us never thought of.

I sold a Yamaha Psr2100, Psr3000, Tyros 1 and a Tyros2 because I could not get them to work like a KN7000. I am now cured.

John C.

PS, Scott, This post has gathered a lot of interest and participation and that is good, thanks.