Anyone know how to zero the windage knob on the Whiskey 5? I called Sig and they said to just pull out on the knob, zero it out and then push back in. He didn't seem very confidant that this is the correct method. Anyway, mine won't pull out and dis-engage. There are two tiny allen screws on the dial. I read somewhere in my research that there should be two allen keys included, but mine only had the one for the elevatuion knob. I'm wondering if the missing allen key might be for this. I've googled and can't find any reference to zeroing the windage knob, only the elevation.