Hi Jim,
I can understand what you are saying regarding swing thoughts and it's very difficult to explain the details of some things in one of these threads.
I can only say that I now use what would be considered a one plane swing but have based it on Nick Bradley's teachings in his book "The 7 laws of the golf swing" he does not portray his methods as "a one plane" but in effect it is (without the hype).
If you can get hold of a copy you would probably find it a riveting read, he breaks down the swing into excellent graphical presentations that also explain the effect various faults have on the body and how and why to avoid them (that can be a great help to people of our advancing years
), his articles on the mental approach are also worth reading.
Finally: Great to hear you are getting better results.