That mixed R160 consist in the movies I saw sound like a Washington, DC Metrorail train when taking off/accelerating. Also, the R32s and R42s can interoperate and trainline together, especially now more than ever since combined in civilian passenger service, there are 272 in service since 8 more R32s have been converted to organ donors like the 14 R42s at 207th which are also organ donors to the other R42s
Now, another huge question I have, and Im sure in can work on the B division main Line except the Eastern Div. Can the R160 5-car sets interoperate/trainline with a 4-car R160 set, like, on the Rockaway park Route, the F, N, R, E, B, D, Q, A? I'm sure that's possible and you'd have a 9-car R160 Trainset!