Founders breakfast stout help (extract)

[Pyg]

Found the below recipe on BYO.com. Need to know if It is on right track with hops,IBU & ABV and recipe:

5 gallons/ 19 L, extract with grains) OG = 1.078 FG = 1.020 IBUs = 60 SRM = 59 ABV = 7.5 %

Ingredients:
6.6 lbs. (3.0 kg) Briess light, unhopped, malt extract
1.7 lbs. (0.77 kg) light dry extract
22 oz. (0.62 kg) flaked oats
1.0 lb. (0.45 kg) chocolate malt (350 °L)
12 oz. (0.34 kg) roast barley malt (450 °L)
9.0 oz. (0.25 kg) debittered, black malt (530 °L)
7.0 oz. (0.19 kg) crystal malt (120 °L)
2.0 oz. (57 g) ground Sumatran coffee
2.0 oz. (57 g) ground Kona coffee
2.5 oz. (71 g) dark, bittersweet baker’s chocolate
1.5 oz. (43 g) unsweetened chocolate baking nibs
1.1 oz 14.3 AAU Nugget pellet hops (60 min.) (1.1 oz./ 31 g of 13% alpha acid)
0.5 oz 2.5 AAU Willamette pellet hops (30 min.) (0.5 oz./ 14 g of 5 % alpha acid)
0.5 oz 2.5 AAU Willamette pellet hops (0 min.) (0.5 oz./ 14 g of 5 % alpha acid)
1⁄2 tsp. yeast nutrient (last 15 minutes)

White Labs WLP 001 (American Ale) or Wyeast 1056 (American Ale) yeast

0.75 cup (150 g) of corn sugar for priming (if bottling)

Add the hops as per the schedule.

Add the Sumatran coffee and two chocolate varieties at the end of the boil. 15 min

Add the Kona coffee and condition for one week,

 

[Pyg]

Ran the ingredients through Brewers Friend calculator.
It came up as 8.4% and 20 IBU.

I know the original breakfast stout is 60 IBU

Thinking I need to up the nugget to 2 oz for a 60 min boil giving it 38 IBU.

 

[Muckdog]

What is your boil size? The smaller, the more diluted your hops will be, which might be why it is coming in at 20 IBUs.

 

[Pyg]

What is your boil size? The smaller, the more diluted your hops will be, which might be why it is coming in at 20 IBUs.

I boil 3 gallon.
In the app I used 3 gallon

 

[Pyg]

Found the Founders Cline thread, where the BYO recipe is posted !

Thanks!