My 2 rail Erie FT AB set arrived today. I am pleased.
First, There is a drawbar and a tether so neither the A or B can operate independently. I guess I missed that, but that's not what I wanted. I like to operate a single A unit. It doesn't look like there is room for a Kadee box between the truck and the end of the frame. If the F7's are going to be the same I may have to cancel my pre-order. I wanted to be able to run A, AA, ABA, etc... Unless I am missing something I don't see how that can be done. It looks like AB or ABBA only.
Second, minor, but you can really see the motor easily through the portholes. Perhaps some black paint is in order because it is distracting to me.
Third, They are running kind of rough at low speed steps. This could just need some break-in so I will defer judgment until later. The B unit sound are much louder than the A unit though out of the box. I think with some CV adjustments and break-in this behavior should smooth out.
On the positive side, the details are nice. Especially in the cab. AND the AB units went around 24"r with an Atlas Trainman 48' gondola in tow even though they are rated for 48"r.