Mocha Porter

I had the idea of brewing a mocha porter in my mind for awhile, but what I really wanted to do is to brew it without using actual coffee and chocolate and only use roasted malts to achieve the mocha flavour.    

Recipe Specifications
Batch Size (Gal): 11.00
Total Grain (Lbs): 25.25
Estimated OG: 1.061
Anticipated SRM: 28.6
Anticipated IBU: 38.2 IBU
Brewhouse Efficiency: 75 %
Wort Boil Time: 60 Minutes

Grains
63.4% (16 lbs) - 2 Row
19.8% (5 lbs) - Vienna
5.0% (1.25 lbs) - Coffee Kiln Malt
5.0% (1.25 lbs) - Pale Chocolate
4.0% (1 lbs) - Honey Malt
3.0% (0.75 lbs) - Carafa Special II

Hops
3.25 oz Northern Brewer(7.00%) @ 60 min

Yeast
5.5 gal -> S-05
5.5 gal -> Nottingham 

Mash Schedule
Sacch Rest - 60 min @ 155F

Notes
07/17/14: Brew day

Fly sparge with 170F water
Collected 12 gallons
pH=5.2
OG = 1.061