I posted a while ago that I had two rackets that were strung just over a year ago but never used, so the strings were fresh but old. One was with a Red Code (crosses) and TNT (mains) hybrid, and the other full TNT. When I hit with the hybrid recently it felt like a trampoline, very springy, I had to alter my swing because the ball was flying and i couldnt generate topspin correctly. But with the full TNT, it feels like it was strung last week, right about as crisp sounding/feeling as normal. So whats up with this, was the poly in the hybrid messing up the feel, did it cause it to lose more tension? And is the trampoline/springy feel considered "soft" when someone would define a string (compared to "stiff" or "firm")?