kverdon,
To help answer your question about the Keys to the Kingdom being the same as Backstage Magic, although I haven't done Backstage Magic, I would assume that some of the MK stuff overlaps with KttK... But, KttK is a six hour tour, so I think that you would go into much more depth on it than you did on BM at MK...
BTW... do you remember if on the Train Tour you ever met an engineer named Dan??? I'm just wondering, because that's my cousin's husband!!! He's worked on the trains for 3-4 years now, and was in Fantasyland attactions before that...
Thanks!