I always get in trouble when I say that 3-railers are less tolerant of small errors than 2-railers. So I won't say it here. But i have never quite figured out why the length of a handrail can be so bothersome right next to that giant turtlehead that functions as a coupler.
But cheer up - I too have trouble with very expensive models and inaccuracies. Hot Water will tell you that I am obsessed with round boilers. Who ever heard of a U shaped boiler on a real steam locomotive?
Or worse, when one of our best suppliers omitted the boiler taper on some distinctive SP locomotives? One of my good friends was more upset with a missing headlight visor. I could fix that, but would not be interested in adding taper to a straight boiler.
As I understand it, even brass imports costing multiple thousand dollars have flaws. For me, the biggest single flaw in most models is the five foot gauge. I can fix the hand rails. Well, actually I can fix the gauge problem too.