[FISH11]

I also have over the last 2 years tried tightening the adjustmet so the turbo fins are tighter and have less flex. That position give my Revo more top speed, but short or long strokes don't matter, it's the extra effort on the legs. You don't feel it at first but after some time, sometimes it's 3 or more hours later, I start to feel a quad or calf muscle. I have had it happen to were I now find a happy medium that won't give me any muscle pain or cramp. That would be the last thing I would want, if there are 3 or more miles to get back to the launch at LJ.