Lil-Bitta Belgium Brown Porter

This a recipe I dreamed up to utilize Brown malt from England, then decided to add a little bit of Belgian malts.
The result was one of the my favorite beers I've made and a real hit with people who've tried it. Based on an old historical English porter recipe I saw floating around, though I can't remember which one now.

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Batch Size 5 gal.
Estimated OG: 1.058 SG
Estimated Color: 40.5 EBC
Estimated IBU: 32.6 IBUs
Brewhouse Efficiency: 72.00 %
Est Mash Efficiency: 72.0 %
Boil Time: 60 Minutes
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Grains:
Amt / Name / %

4.4 lbs Pale Malt, Halcyon (Thomas Fawcett) 40.1 %
4.2 lbs Pale Malt, Maris Otter 37.3 %
1.2 lbs Brown Malt 10.9 %
0.88 lbs Château Cara Gold 6.7 %
0.66 lbs Special B Malt 5 %

Note:
1) if Cara Gold is difficult or impossible to find, it can be replaced with Crystal 120L, though it may not have the same caramel/toffee flavors.
2) the type of pale malt used is irrelevant (Marris Otter, Halcyon, Golden Promise, etc), so long as it's a British Pale malt.
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Amt / Name / IBUs
1 oz Cluster [7.30 %] - Boil 60.0 min / 17.1 IBUs
1 oz Fuggles [4.50 %] - Boil 40.0 min / 9.6 IBUs
0.7 oz Willamette [5.50 %] - Boil 10.0 min / 3.7 IBUs
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British Ale Yeast (Wyeast Labs #1098) or (White Labs WLP 005)