Bridges Russian Imperial Stout

What follows is the prototype for this year's Bridges Holiday Beer. Making a BIG 10% Imperial Stout which will get 5 months of age on it before it ends up in the clients hands. Hopefully they will age it some more but this should give them a head start. I have never brewed this style but have brewed high ABV beers with success. I am dropping my mash efficiency to 60% to accommodate for the huge amount of grain in my tun. Going to Ferment this one at 65F in the lager fridge. Beer Tools puts my FG at 1.026 but I am thinking of racking to secondary between 1.30 to 1.035 to keep it a little sweet and thick. Any constructive criticism will be taken seriously.

Bridges Russian Imperial Stout

5 Gallon
60% Efficiency
1.082 Pre Boil Gravity
1.105 Original Gravity
1.026 Final Gravity
10.6% ABV
100 IBU
0.98 BU:GU

20 lbs UK Pale Malt
2.5 lbs UK Roasted Barley
2 lbs Wheat Malt
1 lb Special B
1 lb UK Chocolate Malt

1.5 Oz. Magnum 90 Min
2 Oz. Liberty 10 Min
2 Oz. Liberty 10 Min

Single Infusion Mash at 154F for 90 minutes. Ferment at 65F with 20 grams of Safale S-04 English Yeast.