Alright all, been working on my form 1 designs for a while. Got them locked down, and then scored a few brakes with the Surefire type qd on them. I cant seem to locate any F1 end caps that have the SF pattern thread. Any advice would be appreciated. I guess I could not use the SF brakes, but, they are cut in the same pattern as my current brake design, just turned down and modified with the SF thread and lock up collar. Serves 2 purposes in my eyes