I wrote Belt and sent some pictures, and Belt wrote back that yes, he could do that, but piano wasn't at all a piano from Mozart's time. And as a matter of fact, he had just built such a piano, after Louis Dulcken, c. 1785, and he wanted to take it around to show at colleges and music schools. So I said fine, bring it, and I'll play a concert on it. He brought it and left it for a week, and I played an all-Mozart concert ... with K. 330 and the B minor Adagio and the Kleine Gigue, well as the G minor piano quartet with some modern string players at 440.