Longest car looking for sideswipe clearance

Here we see my longest piece of rolling stock - a shiny silver passenger car - and we're looking at how much it overhangs, inside hang I'm looking at 15-17mm each side of track centre of "hit" and so 20-25mm for "clearance" Neighbouring track is 33-37mm away on centres, so I only have 5mm or so of clearance space