OK Joe..here's the deal. You can MIDI the WS (or rack) to the T3. You can manually select what you want to play on the WS or rack (PER CHANNEL) then the kbd MIDI tracks (Lower, RH1, RH2, RH3)fro the T3 will pay the sounds OK, including velocity and aftertouch. But it is a manual process, you cannot select the sounds on the WS or rack from the T3. At least you can't easily control which patches/combi's get selected very well.

Also any of the CC's (sliders etc) on the WS that you want changed will have to be done on the WS or rack (or another MIDI contoller, like Korg MINI controllers). The T3 will not control the WS.

Actually for full arranger play the WS will not do all the arranger functions either (don't have enough MIDI controllers on the WS) but there is ways to do those from other MIDI devices.

I've experimeted a lot with all this...a lot can be done. But if you wat more than my first paragragh....you willl need to be very MIDI tech capable.

OK, said a easier way...if you had a Motif rack and wanted to play it from a T3...you can do that. BUT you will have no real control over the Motif rack from the T3. I think Mod wheel and pich bend will work. You will have to operate it seperately. Select the sounds (patches, combi's ect) any controller settings etc. The T3 will send out all the channel data from styles and/or the realtime kbd tracks Lower R1, R2 R3 and that will trigger the Motf rack.

I had my Kurzweil K2600X connected to my T2 (later my Korg) and that was my exprience. If you add a computer to the setup, then more capabilities exist.

I hate to say it Joe...but it's kind of a bad dream to do.

A complex setup like Vagro's howeer is super and works nicely...but he is doing something different than you ask about.