Yup their a "thing" alright. When I took mine off the truck last Dec, I noticed a little play or looseness in the front passengers corner. In Baja last fall I found a road that I wanted to try, about 1 hour in a Fuso with a camper on the back is coming out we stop to talk and He says I'm the first he has seen in two days. I had figured it would take a while its about 180 km but two days seemed a while alright. The hurricane in sept had destroyed parts of the road and it was indeed a slow go. My Alaskan does not sit high enough over the box, on a normal 4x4 road it is not a problem but on this one there was a fair amount of frame twisting and the camper hit the box side and dislocated the front corner and cracked along the weld of the box as well. So the box comes off on Thursday and my welder says I will never have to worry about it again. The "thing" will get a metal gusset on both front corners inside and out and I should not have to worry about it ether. On the good side the wood is sound so its an easy fix.
The road is from the Bahia De Los Angeles through El Arko back to Guerrero Negro. I would like to do it again it goes thru some of the most beautiful secluded country I have seen down there but I was alone (me & the dog) and in hind sight it could have gone bad, Lots of river bed with sand, didn't stop to take pictures as I was afraid I would not get stated again. I will try and do a trip report with the pictures I have but well you know the sun is shinning, last time I put pictures up it took long into the night and I am computer illiterate among other things so maybe later.