It's funny you mention it because I literally just got done listening to the Oskar Blues CYBI podcast (while drinking a Red Rocket ironically). Their beer uses two shades of crystal at about 14% of the grist and has a lower rate of hopping than I'm planning. I guess more than anything it gives me some comfort that my recipe won't get too sweet with 11.25% crystal, though I am using darker varieties than G'Knight uses.
Based on some of the suggestions in this thread I also tapered back the Munich and Wheat a touch and added some Amber malt (about 2.5%), since everything I've read says its similar to Victory and Biscuit (and I happen to have it on hand).
I'm looking forward to brewing this one next weekend. I decided to hop it with 5 different NZ varieties, none of which I've used before. Should be interesting!