A followup to my original question...

After spending a little more time with my new T2 last night I discovered that Yamaha must have had me in mind when it set up its organs.

What I discovered is that they've set the lower third of the keyboard to NOT PLAY the organ voice that's been selected. So...I can chord away to my hearts content with no muddiness at all while I play melody/riff with my RH.

BRILLIANT!

Bill