I installed the corner bracing and the slide in/on brace. The slots work well and IMO the table is much better but not 100% firm. I stopped with one leg braced. I may go back in the spring and add the other leg.
If you choose to do this, use self tapping screws for the corners.Much easier. I used it yesterday at the hunting camp. I needed the dinette sleeping area and was glad the table still was able to be folded.
2013 Smamrock 233S
2014 Ram 1500 5.7 Hemi 3.92 gear
Weight Distribution Hitch