I've noticed a few cases where the various Mk1 coaches don't seem to play ball with eachother. The example I pictured here is a JT Mk1 BG coupled to a Maroon Mk1 BSO. Notice the BG's gangway is stretched way too far into the coach + The different sizes of the RCH jumper connectors meeting eachother. I doubt DTG will have the time or effort to go through and fix every one of them though. On a side note as well, the steam hoses do not connect due to the fact that WSR, LMC and JT Mk1 coaches and the class 40s have their steam heat hoses set up internally as an "AirHoseComponent" whilst in SoS onwards, the Mk1s, Jubilees and Scotsman have their steam hoses set as "SteamHoseComponent". Meaning that to the game, they are entirely different hoses.