Oatmeal Stout 1Gal Test

Testing what it is about stouts I do and don't like. In this recipe I went for roasted, but avoided astrigency (i.e. no burnt husks).
I prefer stouts with a substancial mouth feel (I think), so used oatmeal as well.

OattyStout 1G - Russian Imperial Stout
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Batch Size: 1.023 gal
Boil Size: 1.223 gal
Boil Time: 60.000 min
Efficiency: 70%
OG: 1.074
FG: 1.018
ABV: 7.2%
Bitterness: 33.2 IBUs (Tinseth)
Color: 60 SRM (Morey)

Fermentables
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Name	Amount	Yield	Color
Oats, Flaked	3.500 oz	80%	1 L
Rahr - 2 Row Malt	1.000 lb	80%	2 L
Crystal Malt - 80L	1.000 oz	74%	80 L
Carafa III	4.000 oz	70%	525 L
Caramel Munich Malt 60L	2.000 oz	77%	60 L
DME - Light	4.000 oz	95%	2 L
Simpsons - Maris Otter	1.000 lb	81%	3 L
Briess - Midnight Wheat Malt	2.000 oz	55% 550 L

Total grain: 3.031 lb
Hops
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Name Alpha   Amount  Use       Time   Form  IBU
Styrian Goldings  4.5% 0.500 oz Boil 60.000 min Pellet 33.2

Yeast
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Name Type Form    Amount   Stage
Safale S-05  Ale  Dry 2.232 tsp Primary

Mash
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Name     Type   Amount      Temp    Target       Time
Infusion 2 gal 163.413 F 150.000 F    0.000 s

Boil
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90 min