I would assume from the pic that you need a 510-eGo adaptor, right?
Correct Quoiyaien, so far the T3 is behaving really well with the vari, a little airy at first but the more you tighten the base, the stiffer the draw is.
Do the the toothpick trick learman.
My first one was leaking as well, but when I got another one in there was a new addition to the air tube, a silicone gasket and now they are not leaking at all for me. I am LOVING it on my ProV