"They could be just music teachers." Heavens forbid that we might be judged
by mere music teachers! ;-)

Anyways - they will know how to play Mozart!!! There are plenty of resources
around that will tell you how to play this - I think I am correct saying
that the Appoggiaturas should be played on the beat. Of course it doesn't
matter what the resources say - there is no substitute for good taste!! So
use your instincts too.

Good luck for November and let us know how it goes.

Kaz