After printing the 1:24 Ab body & tender a couple of years back now I had a shortage of viable chassis options, not to be deterred I printed wheels & made my own chassis but it was never going to be more than a display model at that point.
To make it run I purchased a few 4-6-0 cheapies.
Most of the chassis was cut away to form a nice motor block which screws into the body at both ends. Inside the boiler is a rather large lead block making it the heaviest locomotive I own.
The wheel sizes are all slightly wrong but are all steel.
I've yet to print & assemble all the motion work but its coming.
The cab interior is coming along, still a bit to do yet.
A Quick back and forth, Curious to see how much she'd pull