I just got a GG and I am having issues, since you guys seem to be getting great hits, thought you could figure this out for me.  I am getting very different voltages from my GG as I tighten and untighten it.  I have a magnetic switch and a fuse spring with a top on it with plastic screw (not an exposed spring) and the other end on the Stealth cap looks the same.  even when it's reading 4.1 on a fully charged battery I screw on a 2.0 boge carto and get about a volt or more of drop off in my meter and when i take off the meter and just screw it in I am not getting hardly any hit.  All of the connection points seem like shiny metal (stainless steel?)  should I Noalox the crap out of this or am I just doing it wrong.  Sorry to hijack this 
thread but I am looking for this great hit of which you speak.  I have seen all the video's and they never mention any of this or meter it out with a battery (might be missing something) . I am using AW Red 18500's with the stealth cap, but have had the same issue with the UFS v2 and TS air flow cap.