No, the coupler is right on what is needed, because when it was truck mounted it sat much lower that the underside of the car. All that was needed was a bit of judicious filing of the bolster I just mention two places where you were wrong. First, everyone there was unlikely to be "self styled experts" and second, At most of the meets, there are men and women who have studied a subject thoroughly and have published more than one book on the subject. And with only one visit toone event with your lack of open mindedness, how can you make the judgement that they were self styled? Maybe they just told you something you didn't want to hear. I hope you enjoy your style of modeling and I have no wish that you would do it differently if it is what satisfies you.