I used 10 pounds of grapes, cut back on the water a little and added strained grape juice instead so mine was more fruit than called for. I had been boiling the grapes down and straining the juice out to make jellies anyway so I cheated a bit. I did that because of people's posts about Keller's recipes.
The wine isn't bad, just really strong and it's really young, so I'm hoping it'll mellow in time.
The jellies were absolutely wonderful. I have 15 jars left.