prrjim posted:You have solved most of your problems.
Sacrificing underbody detail as a solution is a sad means to an end with these cars.
You never mention what type of coupler you are using. However, a possible easy fix is a longer shank coupler - ie one that sticks out farther, so the head clears the edge of the car body.
Yes, that information would would help to solve the derailing issue. Time honored solutions are available and longer shank body mounted couplers that would pivot greater to permit tighter radii used to be a standard.
