We do two 'scales' at Block Junction, City Scale (generally 6 wide, normally uses the prebuilt buffer/couplers, generally simpler and less detailed) and Fine Scale (closer to 0 guage in terms of size and detail, which means normally closer to 7 wide, more technically complex and (generally) more expensive to build).
Aye, it uses Trained Bricsk Rods, Circuit Cubes Bluetooth Upgrage Kit for the power/control and Big Ben Wheels medium drivers for the wheels.
Aye, I think they ended up all over Europe. I try to avoid releasing *too* many instructions of the same design, and as the black version can be built by just colour swapping the parts for the released version, there's no real need for a seperate set of instructions.
And as someone who sees himself as reasonably good at building mocs, looking at BritishBricks' work is always a little humbling, his ideas are something else!