
The original recipie looked a little strong for me

I am working to:
75% Efficiency
25L Brewlength
Target OG 1056
EBU 56
Could the guys on here who brew Stouts regularly have a look over this and offer any suggested alterations before I order my grains up. Also what would be the best yeast to use.
4075gm Pale Malt Grain 62.2 %
815gm Crystal Malt Grain 12.4 %
405gm Barley, Flaked Grain 6.2 %
405gm Carafoam Grain 6.2 %
405gm Roasted Barley Grain 6.2 %
245gm Black (Patent) Malt Grain 3.7 %
200gm Chocolate Malt Grain 3.1 %
93gm Northdown [6.50%] (60 min) 56.1 IBU
90 min 68 degree mash
60 min boil
Cheers guy's.