I think we have to look at the purpose behind this build, which in this case is to build a "challenge gun". It is not for hunting or some competition event but the challenge to test the owner and his friends. In that context there is no point in a brake. All the brake does is muddy the water as to what exactly the shooter has accomplished. No brake, the calculator can be used to get a reasonable accurate recoil figure. Recoil can be adjusted up or down by the ammo. Its really a very simple idea.