Haha, pre-recording I actually did make it go perfectly vertical at 3mph however when I had FRAPS running it derailed as I was going too fast when it hit that last grade change. I may have to try again with different locos, perhaps even see if I can get it partially upside down like I did once in 1.3.
Being serious in Trainz is fun, but sometimes you just have to take a step back and mess around with a rough 10min scene.