Me neither. But for sure true. Didn't Matt or Sam said, that they worked nearly 2 years on CSX: Heavy Haul (SPG) as it was the first TSW-route? I think GWE also took a lot of time as it was just the second route. Comparing it to now, there must be a significant difference in development time per kilometre - which is of course not a steady nuber, but rather dependent on what kind of scenery you have next to the track.