If I gave the MTH HO scale R17 subway trainset a grade, it will be a D-. To start with the trucks are too light. There is no weight, on the roof interior, thus the interior light was descent. The undercarriage is heavy enough. The only interesting factor is the express and local light switching, but the head and tail lighting is poor and some lights were even omitted, though there are hole provisions for them. The worse is that the coupling of the cars are so sparsely spaced, and one car is like a locomotive pulling 3 trailer cars instead of a prototype multiple unit operation. I will get 3D printed plastic undercarriages withmetal weights placed on them, and make provisions for mounting NWSL stanton drives under the 3D printed undercarriages. I will modify all the imperfections that I mentioned above.
I have already coupled the cars closer together as you can see here: https://photos.google.com/share/AF1QipNo1rDmYB2EbVlRY4eJnW1tVFGCdzRf_fYDJkdDmfOuFA0ShxsGx2yx5obtegYiGw/photo/AF1QipMRsmZO6qK-GfjTVtoz5IaZz49ktcFnKuWt5Vew?key=OW5KYkVsSDJKNm5sdmU2Q3E4UE9WVzBDUXM0UFRn
https://photos.google.com/photo/AF1QipO6BTK-kLbYaNULs8PD_2-tUmM39ZjKkbibWRW0 I also mounted 1/4oz lead weights on the roof interior and under the trucks so that the trucks will have better stability: https://photos.google.com/share/AF1QipNo1rDmYB2EbVlRY4eJnW1tVFGCdzRf_fYDJkdDmfOuFA0ShxsGx2yx5obtegYiGw/photo/AF1QipPDylXatWQE7Cj3ZpkEmuSQxn6fxA58KJ3vsIq7?key=OW5KYkVsSDJKNm5sdmU2Q3E4UE9WVzBDUXM0UFRn
As I continue to modify this MTH R17, I will install better LEDs in the omitted ones and all of the LEDS will be replaced. I intend to put standing and sitting human figures on the interior with two new LED light stips.