I have 2 MUs, one both PS3 and the other one of each. If I cut power they both stop dead. If I hit the direction button, they come to a slow stop. I always have ACC and DEC set at one. I have noticed one difference. If I hit shutdown when running single, the PS3 stops in about one car length. If I hit shutdown with my PS2 engines, they go about six car lengths before stopping. I just checked the mixed MU, and the PS2 engine was still turning long after the lead engine shut down.
Barry: If the individual engines are set to DEC differently and you set the MU at 1, which one takes priority?