Here are a couple contributions from the doorstop contingent. Remember, I know and respect those who need absolute prototype fidelity to the Nth degree - but for me it is just a model.
The story on the Big Boy: my friend Bud (now long gone) came by with a box of Lobaugh Challenger parts - I was able to make one Challenger and one Big Boy out of the parts, and still have a few spare parts left over. The Big Boy and Challenger share a boiler and smokebox, and a lot of other things like drivers, cylinders, rods, etc. The domes are aluminum, since I had some aluminum pipe laying around. Cab and (I think) tender are scratchbuilt using my rivet machine. I will post a close-up of a tender so you can see the rivet detail.
