I visit the Museum of Transportation in Saint Louis as often as I can (about 5 minutes from my work). A couple of years ago an employee asked me if I had any questions so I asked if they had any Vanderbilt Tenders. That must have been the magic password because I was whisked away to the hidden (not open to the public) areas of the park to see the projects they were working on in the shop and about a dozen other things that were not of show quality but still really cool. And yes they did have a Vanderbilt Tender, but it was in really rough shape. That was one of those 'best day ever' kind of days.I've been in the shop there (working at the Museum allows me a lot of stuff I never expected, like getting "Railroader's Discount" in the stores and restaurants at Strasburg and just up the road!) and I agreed that as long as I didn't take photos of Walter or touch anything they were working on, I could walk around and look at things!
So I saw it there in different phases of it's rebuilding. The shop there is amazing to see, since it's a working steam shop!