This loco's trucks rock up and down. While turning it scratches the paint etc. My track is as level as I can get it and no other engines have any problem. I have solved this problem by putting 1/4" foam between the body of the loco and the truck.(on the end that has no spring). My trucks have two posts connecting the trucks to the body of the loco. Mine has only one spring on each truck.
Question: Are they supposed to contain two springs on each truck to take the place of my homemade foam solution?