I wouldn't grade it...My guess would be that the centering would already get an 8.5 and it'd be an uphill battle from there on

That Is Pretty Much What I thought, That I would Get an 8.5 for the centering. If I got REALLY Lucky a 9 but I doubt it.
If I got an 8.5 for the Centering as expected. I was Hoping for 9-10's on Edges, Corners, and Surface, Then It would proabably be worth the Grade. But that would be a Best Case scenario, So I just don't Know... it is a Close one.

If I cannot get at least a 9 I don't think I want to grade it.

9 Was My Guess though.