[richardtheforth]

But what's underneath? 

I popped up to the loft just before bedtime the other evening because I'd been thinking about an idea for a combo of curves at the far left of the track. Before I realised, it was a couple of hours after bedtime and I had a fully formed track. Oops!

   

   

   

   

   

   

The aim is to have a hilly end with a raised loop and a bridge or small tunnel, and at the other end a more meandering curvy slow section. I'm sure there will be problems to sort once I get to have a proper play with it, but a least it's something interesting to have a play with. 
Anyway, the 'keep it small and simple' plan didn't last long!