I tried the 35lbs hybrid above a second time. Much better experience. Serves seemed to be the best. I think in general, w the super low tension, it is better on slow incoming balls and thus also the serve. I think on ground strokes a slower incoming ball and a more moderate swing speed produced better results. I d say there was a little higher ball launch with a little more spin, as you would expect.
Lastly, it was very comfortable on the arm and this would probably be the major advantage of this setup after one gets used to the differences. Also, it certainly sounded strange.
Wilson Steam 105s w Poly/Poly hybrid. Gamma 5800 - 6pt SC. 4.5 NTRP.