No RJR has gone berserkshire
PS-32 steam upgrade kits have 3V connectors and support light bulbs. For what ever reason MTH felt a 2 board kit might be too complex to implement.
Also, they do need a replacement for PS-2 5V and PS-2 3V boards. So that is the PS-32 board. It is sold to ASC with 5V connectors for the 5V replacement and it is sold with 3V has the upgrade kit and PS-2 3V replacement.
MTH never promised you they would allow every train you own to be upgrade to the latest technology, they are not Microsoft they are MTH. They promised a back fit for PS-1 engine to be upgrade to command. You have that.
For the diesel, a one piece board, I imagine it made sense to keep it simple and go with one board, one harness with LEDs as an upgrade kit. Saves money. But if your repairing a PS-2 diesel your going to get a PS-32 board as a near direct swap with your original harnesses. Otherwise you go through the labor of gutting everything but smoke and couplers and rewiring the engine.
How hard is that to follow? 
G
