Your wife has a great eye for detail and clean building and kudos to her for coming out with such great results on a difficult kit! Can you tell us about the air filter? Was it scratchbuilt or is that an aftermarket piece. It looks great.
It's not quite right for a replica Back to the Future train, but would still make a cool piece in a BTTF diroama, just the same. Here's more info on the BTTF train: http://backtothefuture.wikia.com/wiki/Locomotive_131
I don't mean to go off topic, but I had no idea there was a hobby shop over in Rohnert Park. Must be fairly new! I live in Napa and having Loose Caboose Hobbies is great, but other options are good to know of. Thanks Chuck.