We are all rooting for ya.
Some key words in that pile of info, in my opinion, words that support Kathy's excellent points about one condition in relation to another, are the following:
" . . . the association between PLMS and subtle respiratory defects such as upper airway resistance syndrome has suggested that these conditions be monitored when a diagnosis of PLMD is being considered, since they may be the cause of sleep complaints by themselves. The PLMS in this situation may only be incidental associates of the respiratory disturbances. Also, excessive daytime somnolence associated with PLMS may not be due to the leg movements, but merely an associated condition, such that treatment suppressing the leg movements may not resolve the somnolence. . . . "
In other words, as I read that, it ain't always an "either/or" thing. Thus, as Kathy stressed, the importance of one thing at a time when trouble-shooting sleep. And, in my opinion, often the best place to start is effective PAP. Once the breathing is stabilized by optimal PAP therapy over some amount of time, then it can
sometimes be a little easier to figure out the rest of the equation, as I understand it. It is my opinion that positional therapy may not have much of a role to play in that troubleshooting/diagnostic process. But hey, I could be wrong. I often am.