Art,
typically, how much damage is done to a rooted plant after being up-rooted and placed in another position in the tank? Perhaps it'd be easier to answer in relation to how long before you see new healthy growth in the new location?
I think you hit the nail on the head for me as well...#1 is to get healthy plants. And if one is repositioning the plants every wk or so "trying to get it just perfect", that's gotta be counter productive to getting and keeping healthy plants.
Chris