Thanks - yep it is in compatability mode TS2009 (SP1). It looks OK in TS2010 native too, but some of the trees turn shadowy/transparent and would need replacing.
I'm preferring to just keep building it for the moment, rather than faff around with patches, or moving over the route-building to TS2010. Hopefully some more pics soon, though I'm alternating between three different routes at present.