Hi Deane,
Congratulations and welcome aboard the Korg microArranger train.
I'm curious though,
because I remember you saying that because the microArranger doesn't support automatic STS (1-4) changing when moving from one variation to another,
that this alone would make it a deal breaker for you.
Now that you have the KMA, how (if at all) are you dealing with that, especially realizing how essential it is for you on your Yamaha keyboard.
Scott