This may sound dumb, but why not do five 1 gallon batches with varying hop ratios instead of one 5 gallon batch? That way you could reduce overall quantity of hops and directly compare each batch to Heady to move you in the right direction more efficiently?
This way you could quickly eliminate the wrong ratios and hone in more closely on the right ratios.
This way you could quickly eliminate the wrong ratios and hone in more closely on the right ratios.