I have had that B&M lash-up set for a decade and have never had an issue operating them until I programed them to the legacy cab 2 recently. I usually keep them parked on a siding on my layout. I recently purchased a pair of legacy gp7's, also in the bluebird colors. WOW the technology is incredible. And the smoke unit will fill the room. Back to the lash up...ever since I've been running the legacy engines the old TMCC lash-up turns itself on and off, the lights blink, and it moves in small jerking motions when it's not even addressed by the legacy cab 2 controller. I think they are mad because I bought the new ones. I have noticed the pair of motorized engines from the lash-up run at different speeds, Simply hitting the engine reset "0" resynced them. I think operation in transformer mode would make that not possible and then they would fight each other. Also I did disable the electro couplers because they never would stay closed.
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