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I model in 1:20 scale and I use Accucraft couplers.
When I travel to some friend’s railroad, they may model in a different scale, such as 1:29. Often they prefer Kadee couplers.
The Accucraft couplers will couple with SOME of the Kadee, but not the smaller versions.
Thus, I decided to get a locomotive that would fit in with the 1:29 modelers. I would use Kadee couplers on it, so it would couple with their rolling stock.
In addition, since I model 1930s Narrow Gauge, something a bit more modern was in order.
I chose the Aristo-
I installed a Revolution Receiver and used the standard Revolution Diesel Sound Card.
I added some light weathering and I was done.