Thanks. I'll be using a cake of chico on this and adding some gypsum and a bit of chloride that I typically use for hoppy beers.
RE: efficiency, I used to flysparge to get 75-80%, but I like the speed and better malt flavor from a single batch sparge, so I just add more grain.
I'm using the start of chill to replicate a hop back, which I don't have. I've never used simcoe, but I've made a pretty similar beer, scaled back as a standard IPA with chinook. What IBU do you target for IIPAs?