Well, if the market is saturated with Atlas GP7/8, how come I seldom see more than one or two at a train if that? And the ones I see are usually for western roads I have no interest in.
I have a pair of Atlas Erie-builts that usually run pretty smoothly, I do admit.
But the Atlas are still generic, no PRR antennas etc. And if the trucks are like the dummy C425s I bought and converted WEaver Drives, they are too wide and sit too high. a 1/16 of an inch or so off and major dimensions is no big deal, but some of the mfg GP9s are 1/4 inch or more too high on the trucks to clear their gearings.
My experience with two motor dries is limited to MTH PAs, AS616, GP30s, Weaver RS11, Weaver U25 (sold), and the above mentioned Erie-builts. As mentioned the erie-builts are OK, and I got them used at a very good price or I would not have tried them. All the others are OK but they just are not as smooth as single motor drives. Also the speed is way too high, I have had to wire them all in series to get them to not behave like slot cars. So my personal disappointing experience with two motor drives leads me to avoid them.
