Made a 5.5g batch of this again the other day.
I'd like to second my recommendation for subbing out the US Pale for Marris Otter on this. Where as it won't get you closer to an EF clone, it will get you closer to a much tastier porter, ( which is saying a lot, as EF is one of my favorite porters.),.
This last batch I FWH'ed with 1/4 oz of homegrown Magnums, subbed the Pale malt for MO, added 10oz's of Aromatic Malt, ( adjusted the IBU's to compensate), did a 120min mash, and used dry S-04. Primary @ 64f. Other than that, everything was as per the OG recipe.
This promises to be quite the beverage.