RE: Slab sinking
The foam injection method is "Uretek " here in Texas. I had them level a carport slab several years ago and it stayed put.
Google Uretek and I bet they have a presence in your area.
Good luck.
RE: Trailer Brakes HOT after adjustment
I think you are good to go. the heat was from excessive braking and I would not worry about a 7 degree difference. I think the slight rubbing you was hearing was the magnets and not the brake shoes.
RE: Rec Pro ???
Purchased double recliner with center console. Experience was great, quality of furniture not so much.
Was your recliner what they call faux leather ? Thanks
Yes but that was not the only problem. The pull handle on one of the recliners broke and it also rubbed a hole in the seat.
RE: B&W fail or Operator Error?
The fact that he was able to re-hook the trailer and pull it for 3.5 hrs makes it obvious it had to be operator error the first time, in my opinion.