I am doing what someone did earlier and subbing 60L for 20L. When I went to my local homebrew store, they only had leaf magnum, no pellets. I talked with one of the guys who worked there and he suggested, trying zythos. He pointed out that Ballast Point's sculpin uses 4 different bittering hops and zythos is a hop combination as well. Well, that won me over! So just changing those two.
Really looking forward to this! I will post results in the future!