Just to see if we could get an LM-3S module into a Bachmann Climax. This belongs to a friend who wanted it converted to RailPro.
The 21 pin board and speaker were removed. Each wire was unsoldered from the 21 pin printed circuit board and soldered to the 9 pin JST plug one at a time.
The coal bunker needed a brace in the center removed to allow the module to sit upright. I used an iPhone 4S speaker that was cut down to put in the bunker. The 6 pin plug cannot be used due to not enough space. The speaker wires were soldered directly to the necessary pins.
I made a styrene cover to temporarily cover the module since the coal load will no longer fit. With some hatches it would make a good oil tank, but the owner is going to use wood for fuel.