Good job OT, you look awesome.
I mainly just eat twice as much now Wolverine. A big difference is I take in as much carbs as I do protien. I will sometimes eat 2 big peanut butter and jelly sandwiches with a big cup of skim milk before bed. Optimum nutrition also makes a 1200 calories shake called "Serious Mass". That really helps me get in the healthy calories I need.
Thanks for the compliment bro, you've got some awesome mass yourself, for real.