My QQ locks just fine but KK doesn't. Its like locking ring get off from screwing part and just sitting on flat part of firing button.I received my 2 Marstech QQ mods today. They are nice indeed. I have a couple of "cons" though. 1) Flat top batteries won't fire them. 2) Locking ring won't work (unless there is some kind of modification involved?). Can anyone that has purchased it confirms the above, or it is just me doing something wrong?
I don't use flat top batteries.
and I don't have the other...(I do have the Marstech Kayfun Lite Style Rebuildable Electronic Cigarette Atomizer - Silver SKU 13053, and a Tobeco KFL, they all work great!)
If it takes longer to go from San Fran to Los Angeles than it did from China to the US I will be 


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...... tihihihihihiiiii 
.. it was crazy, and funny at the same time.