Had a friend who put a 4-point Lippert system on a Mesa Ridge 5er once.
His comments on the installation process are not repeatable here, but said it was the best thing he ever did.
Unfortunately he passed in 2018, so I can't ask him details about the process.
He looked at my TT, and since my frame is covered by the underbelly material, to start I have to rip that all off to get to find proper mounting points. Also teh frame I-beams might not be tall enough to mouont.
After I got a system installed, I would have to build a new underbelly.
Of course I didn't do that.