It is double track, radius 2 and 3, can't remember the gradient off the top of my head, will measure it tomorrow and get back to you, I'm sure I wrote it on it someplace so I would remember, but every loco I have gets up it alright, some of the older traction tyre ones needed the tyres replaced with a magic American potion called Bullfrog Snot, don't ask me where they came up with the name.