Plug-n-Play decoder, non-Plug-n-Play Loco?

[Charlie B]

For some reason i thought the fuel tank on an S2 was under the cab deck.

--Randy

The fuel tank is under the cab, 660 gallons. The box in the center below the frame holds the batteries. We had 4 4cells on each side. S1 and S2 were both like this. The round tanks are the main air reservoirs.
Charlie