I think its one of those things where they suggest you do it, but the tolerances might be close enough that you don't need to? The other issue with that center stand is that it interferes with the sidestand. I think you have to put the side stand down to be able to retract the center stand. Sounds like a hassle.
Hepco & Becker also makes a center stand for the gen3. I posted about it
a week ago.
I agree, for that price the center stand should work perfectly. Maybe that will happen on the gen4.