What does "wonky" mean? It sounds negative. I have 2 Streetly Trons, a 1972 M400 and a 2013 M4000 (no "D"), and I can find nothing negative about either. Neither requires much maintenance...just a keyboard adjustment now and then. I spend more time tuning my guitars than I do maintaining my Trons, and I play my Trons more than I play my guitars.
Bernie
Bernie