I was having work done my rig, and needed the kitchen slide skis replaced. So I had the Service department do them after ordering them from Alliance myself. I gave them the skis and they had no idea on how to install them. They claimed they contacted Alliance for advice, and they received information to install them with the screw side UNDER THE DAMN SLIDE! I told them that was a mistake, that the screws could damage my floor. They went forward with it.
Sure enough, the screw heads damaged the floor, AND the ski broke because it was bent against the floor (ie no sealant used). I had purchased 4 skis meaning to preventatively do the dinette slide (but they did not install them). Before my last trip, they replaced the ones they previously installed (no cost other than the 2 skis from me) and now that I back from my trip, they are now fixing my floor.
I really do not want to name them. Just be careful if you are not installing them yourself (looks real easy on the videos I see on YT).
Good luck, and have fun!
//KMac