Until the complete release of preserved collection on TSW2, I would have put this down to a specific route. However on running custom scenarios on the likes of GWE plus running GWE on different routes. My findings are that the issue is with the trains. Were they built in an expensive manner, meaning they cant load in and out as quick, or are too taxing to have on screen? Ie GWE all resident stock 166 HST and 66 vanish long before the horizon on GWE and any other route I run them on. Yet I can run a railtour scenario on GWE and watch it travel for as far as I can see in to the distance no problem.