rvrunner----
I am a long way from any kind of expert on slides, but I do have some thoughts. I don't know how many Lippert Swintec unit there are out there---but there are a bunch. Just driving through the small RV park where I'm currently parked in upper Michigan this morning I counted 7 out of 21 RVs that had slides out were Swintec--mostly on trailers and Class C units. That's a third of the RVs in this park--that's a pretty high percentage using this design, and obviously, not all of them are failing. There's a world of Swintec slides out there, and most of them continue to work.
You mentioned in an earlier post that you have had three slide failures in three years---Wow! I don't blame you for being upset and concerned. You didn't mention what the failures were, whether they were all the same, who repaired your unit, or what had to be done in repairs. If Phoenix handled both previous repairs, I believe I would have a heart to heart talk with them before they did the third one, and find out what they could do or what I could do to prevent there from being a fourth instance. The 110,000 miles that you mention on your PC indicates a lot of usage, and I would ask them if that is contributing to the recurring problem.
The repair on my slide consisted of Phoenix pulling the slide, replacing completely both side drive units, and "reinforcing the rear wall adjacent to the slide". Essentially, I've got a new slide installation--it wasn't cheap, but right now it's working great. I told them that I trusted them to fix it right, and they said they did; I will take care to use it properly, but I expect to see the proof of that in future performance.
You have already relayed the problems that not having a working slide-room create for you, so if you don't want to replace your rig at this point, fixing the slide seems like the obvious thing to do. But again, if you're going that way, I would have a careful talk with Phoenix that I wanted them to do whatever was necessary to try to ensure no more slide issues as long as you use it properly. I don't think that would mean that they would have to "rebuild" your slide room--but they may need to install some reinforcement in addition to new slide mechanisms, depending on what your exact current problem is. In any case, Phoenix should have the best understanding of the coach and the best capability to fix it correctly.
All the best, Mike