I am so tickled by this thing I’m going to have to try building another. If I had a single feature I’d like to request in some future model it would be to have the rate for the sequencer have a way to control it precisely and maybe have a display of it on the numeric. But it is really fun with this old Yamaha and it’s also worked with every cheap old Yamaha and Casio I’ve tried, in addition to an old Roland PX-10 I tried it with.