Just so you all know, this is not an isolated issue....mine is doing the same thing, but since I am No longer covered by the return period so back to my old bolt... FYI, it is the positive connector isolator that is bad. Looks like the pin can move to any side and touch the ground (Sides). When looking at the unit, it looks like the connector center pin was just push fitted with almost a silicone type of insulator, and will wear out VERY quickly. Ordered 13 August 2012....received on Aug 17th....Useless as of October 7th.....wow, not even 2 months old and useless....Avoid this unit until they get a improved 510 connector installed!....$70.00 paper weight.
Since I am out of warranty, I did not bother opening a ticket (They only give 14 days for defects!).
BUT, I will shop with this site again, as they have great prices on products I use (eGo Sunfire clearomizers, adapters, etc!!!). I just will avoid any MODs for now.
Just my 2 cents