Hello Ron. Thanks for the explanation. I understand the issues. I now agree, the best bet is just to send it back. I just check out my rear coupler. No sag. It looks normal.
Good news, if there is any, I had to send back my Lionel Veranda last month. Electronic issues. Anyway, from me sending it back to me getting it back, it was two weeks. Problem fixed and fairly quick turn around. Hopefully the same for you.
Please keep us informed. Thanks.
Donald