FYI, this came out nice, great hop flavor and amazing aroma, but very little bittering.
Sad to say a slow infection got to it after one case was consumed. But it was nice while it lasted. Had to pur the lastcase down the drain.
All the flavor/aroma was sweet citrussy kind, not grapfruity at all and none of the onion/garlic accents some people have reported.
I will probably do the same recipe again, but wil opt to add about an ounce of bittering at 60 minutes.
But it was a great experiment to see what happens when you cram 6 oz of hops in the last 20 minutes of the boil.
Cheers.