my chocolate stout - need your feedback

[400d]

ok guys, this is what I want to brew in couple of days. I would appreciate your comments on this recipe. as you can see I intend to blend S-04 and US-05 (I read some really good reviews on this). What do you think of the grain bill, hops? would you change anything? please comment, since I'm brewing 50 litres for the first time and wouldn't want it spoiled...

Choco Stout
13-C Oatmeal Stout
Author: DK
Date: 9.11.2011



Size: 46,0 L
Efficiency: 75,0%
Attenuation: 72,0%
Calories: 207,23 kcal per 12,0 fl oz

Original Gravity: 1,062 (1,048 - 1,065)
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Terminal Gravity: 1,017 (1,010 - 1,018)
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Color: 26,91 (22,0 - 40,0)
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Alcohol: 5,85% (4,2% - 5,9%)
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Bitterness: 35,2 (25,0 - 40,0)
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Ingredients:
11,5 kg Pilsner Malt
0,5 kg Crystal 120
0,6 kg Carafa® TYPE I
0,5 kg Oats Flaked
0,5 kg Roasted Barley
60,0 g Northern Brewer (9,0%) - added during boil, boiled 90 m
30,0 g Northern Brewer (9,0%) - added during boil, boiled 10 m
11 g Fermentis US-05 Safale US-05
11 g Fermentis S-04 Safale S-04
70 mL Chocolate Extract - added dry to secondary fermenter
0,5 kg Lactose - added dry to secondary fermenter

[nobby]

Why are you using Pislner Malt??? Just use basic pale malt its a lot cheaper and you will not notice any diffrence in flavour

[400d]

I'm using pilsner because I have bunch of it have to use it or it will go bad... do you think my grain bill is ok, beside the issue with the base malt?