OK, Terry--to be a little more specific on the mounting.
On my 2019 2552, the rear table by the pantry has two pieces of 3/4" material stacked as a mounting plate as shown in JJ's second picture. The material in mine measures 6"W X 12"H. As in JJ's photo the top of my mount is about 1 1/2" below the pantry door, but unlike his--my wood mount plate extends all the way to the floor. The original wood in that area is "paneled", and I think the key is to extend those wood mount plates as needed to reach solid face frame material on each side of the sunken panel. Vertically, the aluminum Lagun mount is about 3/4" inboard of the edge of the pantry wall. It just brushes against the upholstery of the couch.
The mount for the front table is more simple. As shown in JJ's last picture, (and as you mentioned) it is just a single piece of 3/4" material mounted to the 4" face frame that frames the slide. My mount measures 4" W X 7 1/4" H; it looks to be a little shorter than JJ's, so I don't think the length is particularly critical. Since they use a single 3/4" piece here on the front table----I suspect that the reason for the double 3/4" pieces on the rear table is not structural, but just to space it out another 3/4".
I had forgotten that the earlier pantry had a single slide out. That complicates the issue for the rear table. My pantry has 3 individual deep drawers mounted on individual drawer slides. The top door clears the Lagun table and uncovers the top two drawers. To open the bottom door and access the bottom drawer, you must remove the table--or you could decide to leave that area with no door as an open storage shelf. I would imagine you could pretty readily convert your single slide pantry to the individual drawers and dual doors if you wanted to go that way. I haven't investigated whether there is any other mounting option for the rear table--but I doubt it. If another one was realistic, Phoenix would probably have used it rather than obstruct the pantry.
As far as use goes, I have found the tables solid enough for common uses. I eat on them, use for food prep, use for computer desk, etc. Lagun says capacity is 50 pounds (including weight of top). While they have a little "springiness" and I am sensitive about not bearing down on them to rise from the couch (or something like that) I have found them solid enough to not worry about using them. I leave mine mounted all the time, since with the swing and table rotation combined there is a lot of flexibility in their location. They swing back over the couch to clear the walkway with slide in, and even when using the couch as a bed, they can rotate to the side to essentially work as side tables. I think they add enough usability to the interior to be well worth having.
Mike
