Thanks Mike and Bryan.
This is a tough one filled with many intricate details. Fortunately they're mostly at right angles. I can't believe the amount of steel they put in these locomotives. They're monsters.
This is the underframe. Can't get too carried away since there's plenty more down there. Had to adjust the trucks and the main reservoirs to line up right. Most everything is either dimensioned or traced which is within less than an inch.
I did a lot of structural drafting and design in the past so that helps. For anyone aspiring to do this kind of work learn about how it's built whether it's furniture or a locomotive. Or a house.