Tonight is my first night using Yasaka Rakza7 as fh rubber to rebuild my fh. Here are my empirical observations. ( i played 18 sets with two different players tonight using R7 on fh side.Blade is BTY SK7 which is a seven ply all-wood construction )
1. it is bouncy / catapulty / trampolinish no doubt about it. But for context, it is not as bouncy as Tenergy 05, the gold standard for bouncy rubber.
2. R7 trampoline is not so much if compared to Donic Acuda S1 ( my current rubber for the past six months or so )
3. R7 ball flight path is higher and more rainbow like ( more curvy parabolic )
4. I find it has a safer net clearing ball flight path.
5. R7 make me feel that my fh drive is assisted.
6. Grip is good and less effort needed, that is, the rubber grips well.
7. Due to the greater trampoline effect, the ball leave the rubber very fast and expect the ball to come back fast. Hence, I would suggest to stand a little bit mid distance to allow the user space and time to counter-loop or drive.
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