Ask him to solo whatever style Parts are doing SA voices OTHER that the doo-wops...

That's probably the most IMPORTANT thing added to the OS (for all the attention it's getting here ) and no-one's really commented, yet...

Oh, and ask him to play a full keyboard piano part... Then, as he's banging his fingers into the plastic at the low end of the keyboard, ask him why Yamaha won't make one of these with a longer keyboard..!