Now the racquet consists of the blade, which is reasonably difficult, and also the rubber, which is reasonably soft. Let’s state you strike FH topspin, the sphere goes well deep right into the rubber/ sponge, which raises the throw angle (picture like there is even more of the rubber around the sphere to drag the sphere), yet if it goes unfathomable, a larger part of its energy strikes the difficult blade, which subsequently reduces the throw angle. And the remainder is simply discovering the equilibrium for you …
So, on sluggish shots, the softer sponge permits the sphere to go a lot more in and also the throw is greater, yet on faster shots that very same soft sponge will certainly quicker enable the sphere to strike via to the blade, and also therefore will certainly make the reducedthrow So on FH where you usually struck more challenging you might desire more challenging sponge, or else the softer sponge might seem like losing power.
If there is extremely little sponge, the sphere will certainly obtain quicker to the blade, and also the very same reasoning uses.
If you have in a similar way difficult rubbers, like e.g. Rakza X and also Z, the tackiness of RZ aids to get it, and also it has greater throw.
About the acnes, I’d state the very same reasoning because of softness/hardness as above uses. My very own experience with H8-80 which has longer acnes vs H3 in the very same solidity – it seems like H8-80 is a lot more rotate delicate, it is a little bit difficult to explain. It pressures me to go a lot more right into the sphere, when obstructing, to not slip up, so by crash it boosts me, yet I’ll change anyhow when the period finishes 
Cheers.
