Frustrating! As much as I'd like to watch these, Instagram won't let me join, says every username I pick is already in use. Time to go home and go to bed, there will likely be plenty of videos in the morning on other media. WOW, I hope they have success with this testing and the first trip! So many things can go wrong with a fresh rebuild, and this is basically two steam engines in one, so at least twice the chances for an "OOOPS!"
BTW, that cold weather sure makes for some dramatic water vapor! (by the time it becomes visible vapor, it's not really steam at the point--minor technical detail, but if I didn't mention it, someone else would!) 
PS if things go well today and tomorrow, maybe the shop crew can get a full night's sleep before Saturday!
