I picked up a Roundhouse/MDC HOn3 Shay about ten years ago. I never really got into HOn3, but recently picked up some dirt cheap On30 locomotives and cars. I thought I could re-gauge the shay, make a bigger boiler and cab and have a nice quirky slightly off scale shay as well.
3d printed adapter bracket
Runs - poorly - but it runs.... no where to go but up.