Well, pbusardo did an update on his site today where it sounds like the issues with the T3's may be coming from Kanger itself.
Basically he tossed up the possibility that to keep up with demand, Kanger might be outsourcing T3 production to other companies and those outsourcings aren't keeping up on the quality control
Nevertheless the problems I had were with heads made in october/november. This last batch worked great. No gurgling, no bad contacts, heads screw all the way down.