You're welcome ;-)
Feel free to correct my english anytime, I know I usually write terrible.
As far as power production goes, one of the things that gets emphasized a lot is to accelerate the hand through the pull. At the very top of the stroke, there's no leverage there (but you still want that extension for good streamlining).
And thank you. I'm becoming more and more convinced that the mechanics of swimming have significant parallels to those of rowing (the blade entering, through, and exiting the water being the arm in the stroke)
Why would it be anything else? Rowing shells are designed to minimize drag, and the oars provide *all* the propulsion. Be like a heavyweight eight. Minimize (or minimise, if that helps) your drag, maximize force applied to the water opposite the direction you want to go (either by pulling really hard or pulling really often, or both), and minimize force applied in all other directions.
Early catch, straight pull back, quick recovery. Repeat.
"i disagree with your analysis [or judgment], nevertheless you have the responsibility of moderating this board so i honor your authority to make the moderating decisions."