Gnarly Barley Sunday Imperial Stout

[Al-Loves-Wine]

So though I've made a number of stouts, finally decided to try an imperial now that I built a shiny new 60L mash tun. It is mega HOT and boozy right now with a 9.4 ABV, but flavor is really fantastic, and hope the alcohol mellows a bit with age. Probably leave it for 4 to 6 weeks to age, and try a thief of it after 4 to see where its at before I decide when to keg it. I was really aiming to stay in style, and ended right on the cusp of the FG with a 1.019  for 3 straight days. (BJCP says 1.018 for style)
Columbus AA% adjusted for age in BeerSmith.

Recipe: Gnarly Barley Sunday Imperial Stout
Brewer: Al
Asst Brewer: My Dog
Style: Imperial Stout
TYPE: All Grain
Taste: (30.0)

Recipe Specifications
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Boil Size: 8.97 gal
Post Boil Volume: 7.28 gal
Batch Size (fermenter): 6.00 gal   
Bottling Volume: 5.25 gal
Estimated OG: 1.091 SG
Estimated Color: 39.6 SRM
Estimated IBU: 79.0 IBUs
Brewhouse Efficiency: 66.00 %
Est Mash Efficiency: 77.0 %
Boil Time: 90 Minutes

Ingredients:
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Amt                   Name                                     Type          #        %/IBU         
15 lbs               Pale Malt (2 Row) US (2.0 SRM)           Grain         1        63.8 %       
3 lbs                 Munich Malt - 20L (20.0 SRM)             Grain         2        12.8 %       
1 lbs 8.0 oz      Caramel/Crystal Malt - 60L (60.0 SRM)    Grain         3        6.4 %         
1 lbs 4.8 oz      Oats, Flaked (1.0 SRM)                   Grain         4        5.5 %         
1 lbs                 Chocolate Malt (350.0 SRM)               Grain         5        4.3 %         
1 lbs                 Roasted Barley (300.0 SRM)               Grain         6        4.3 %         
11.2 oz             Wheat, Flaked (1.6 SRM)                  Grain         7        3.0 %         
1.50 oz             Columbus (Tomahawk) [11.79 %] - Boil 80. Hop           8        41.9 IBUs     
1.50 oz             Columbus (Tomahawk) [11.79 %] - Boil 25. Hop           9        27.6 IBUs     
1.00 oz             Columbus (Tomahawk) [11.79 %] - Boil 10. Hop           10       9.6 IBUs     
2.00 tsp            Yeast Nutrient (Boil 3.0 mins)           Other         11       -             
2.0 pkg             Safale American  (DCL/Fermentis #US-05)  Yeast         12       -             


Mash Schedule: Single Infusion, Light Body, No Mash Out
Total Grain Weight: 23 lbs 8.0 oz
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Name              Description                             Step Temperat Step Time     
Mash In           Add 32.58 qt of water at 163.3 F        150.0 F       75 min       

Sparge: Fly sparge with 4.45 gal water at 168.0 F
Notes:
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