Gonzo,
It's sometimes hard to detect joking when we can't hear the speaker's voice or see his facial expression. I know you are knowledgeable of trailers but also know that you pull a big gooseneck LQ horse trailer so didn't know if you were aware of the too close axle placement on almost all fifthwheel RVs.
I see the axle placement on the Consumer RVs all the time, and wonder HOW THE HELL does that work? How can manufacturers continue to "under axle" or "under Frame" trailers and not run into liability issues. I guess that I must be the exception, I actually figured the wt of cargo and trailer THEN selected my axles. .