A little followup on the beer.
I added the toasted hazelnuts (18 oz ground to a fine meal texture) to the mash for the entire 60 minutes. Total grain bill was 41 lbs.
It has been kegged and forced carbd' for a little over a week. Although it is a little early to say its finished I had to draw off a pint today after work.
It has a very good aroma. Some toffee/caramel notes maybe. It poured with a decent amount of head but it subsided rather quickly, maybe lasted a half glass worth and no lacing. I was afraid the I wouldn't have much head retention due to the possible fat content of the nuts but I think with more conditioning head retention may improve some. Maybe I will increase the co2. Taste is also good. It carries the toffee/caramel through with what I perceive as hints of chocolate. It has a smooth mouthfeel that tapers to a light dry finish. All in all I think with some tweaking it may be a great beer but at this point it is a good beer and worth another try.