Lehrbuch
First Post
The problem with a Large PC race is that it can use Large weapons (2xdice).
Only if the Large PC is actually wielding an oversized weapon.
Given that the man-bit of a centaur (the bit with the arms) is more-or-less normal person sized, a centaur should be wielding normal sized weaponry. The specifics of centaur anatomy mean that he can't really wield oversized weaponry. So, this is not an issue.