1) right now, slice mastery influences only the speed & spin of the slices ; it may change in the future.
2) But now, when you charge a short time, you do a poor defensive slice that is easy to attack but has a high net clearance and isn't too long, so there are not too many errors with it
3) I won't do the 1st step speed boost helper before everything else is in place, because 1st I need to balance the game correctly with the default settings (ie: if everybody starts to play with this helper I won't be able to make the game works without it

4) Tonicity has been renamed to Muscle Tone ; it's still the same thing, though => https://www.managames.com/tennismanager ... tml#skills .