Stubborn. Anyway, I tried.That may very well be but after two decades and thousands of dollars spent trying to find the "real cause" searching for thanswer is no longer important -learning to ADAPT TO the imbalance works just as well. I have learned that trail running manages it best. Swimming exercises, second best. Good enough!
Back to rowing, what kind of rower did you get? I think you really need to invest in a high-end rower like the Concept II. I don't know if the cheaper rowers allow for good form and mechanics, which are crucial in such a repetitive activity.
All the best in any case!