my subtank mini doesn't leak at all, it's even damaged by the seals and still doesn't leak, maybe you got a faulty base with some bad machining? use your warranty 
tanks I have had zero issues with.
Kangertech Mini Tank with stock coils. When RBA section you have to build it right, but have gotten to the point of no leaks
30 watts generally on stock coils, 15 watts on RBA builds currently.
Aspire Atlantis V2 - Stock coils works fantastic, never had ANY leaks with heavier VG based juices. Now I have noticed it will spit/drizzle with thinner juices, but if you like foggin' it, 30/70 and up don't leak and it wicks very well. I usually run it around 30w for my speed.
Aspire Triton - Stock coils work fantastic as with the Atlantis (same coils) Only difference I noted was the flavor is muted. RBA section is OK. Flavor is better, but for a rebuildable IMO it's not great, just good.
Obviously my opinion may not be like others, but maybe this will help
Good luck to you.
The O rings seem to be fine... its actually leaking out the air intake holes from what i can see..Possibly a stupid question, but have you checked the o-rings? Replaced them? Are they sealing well?
The O rings seem to be fine... its actually leaking out the air intake holes from what i can see..
I have used the RDA and the RBA and still same problem with both.Then you seem to have a coil issue? Are you using the coils it came with? RDA deck? I have 4 Kanger subtanks and none of them leak, or ever have for that matter. Been 7 to 8 months on them without problem one.
I know that doesn't help, but....
I have used the RDA and the RBA and still same problem with both.
The problem is the e liquid heating up. I leave my rigs in the car and go to the beach all the time. When my juice heats up it almost becomes like water. Kills my coils all the time and leaks like a mother.
im looking for a sub ohm tank with good cloud production, good flavor, and doesn't leak like the subtank' by Kanger. They seem to leak like a sieve outside of the air holes, and under no matter what I do. No o rinks, still leaks. Nothing works. So, time to move on to a better tank.