One thing I have found to be really important with the T3S - Make sure you check the head is screwed in tight, I have had a couple work loose with tank swapping and this causes a leak which floods the battery as well as giving you a mouthful of juice.
Mentioned in a previous post " the T3s aren't rebuild-able " they are but a tad fiddly to do, the T3S is much easier to do.
Mentioned in a previous post " the T3s aren't rebuild-able " they are but a tad fiddly to do, the T3S is much easier to do.