I know it's fine with a dedicated line... also it works normally when there's no info passing through in 15&16. I have been thinking about , and looking around for a controller with a MIDI through, but they're not cheap.
I figure that they didn't invest a lot in the MIDI protocols in these other controllers. The only way to find out is to buy one, and that, well if you're married, you know .
Thanks for responding!