I have double checked the serial numbers so that FSP1 is the oldest, FSP2 is next and FSP 3 is newest. Several times I have started all over, syncing each individually starting with the lowest, then the others successively and then connecting them together in the order of oldest to last. But in Universal Control Window, the oldest is in the middle. I had named my 2nd one drums, as acoustic drums had been plugged into it, while I have FSP as midi, since midi audio outs are plugged in. But when I play a song that has mix in Cubase going to Bus 1, it is set to drums. When I listen with headphones, sound is loudest in FSP3, and softer in FSP1, I named midi, while there is no sound from FSP2, I named drums, Very confusing, and I don't get it.