[Yakboy]

Just wondering why it's impossible to do this with the Faller track?

Jason,
It's the fact that you need 2 rails to get onto the roof and 2 to get off, so the ramp would be very wide, also the curve of the roof is going to be a nightmare, I have Faller flexible track but it's not that flexible, so thought I'd explore other options.
I am used to working in foamex and like the idea of the dremel router, so may have to have a go at a straight piece as a test