We may be able to help you with your leaking problem. What is your current tank that is leaking?
Also, a mini Davide by AnyVape is comparable. I've got both and favor the Davide. Just make sure it's not a clone you're buying!
Is the eliquid leaking on the battery or are you getting eliquid in the drip tip (and in your mouth)?I have a Vpro C=C-Twist from Newegg
New Ego C Twist (2pc) 1100mAh CE4 Vaporizer Starter Kit + Charger & Case ~Black - Newegg.com
Check out this thread: Can I fix my leaking CE4?It coming from the battery end. It is not a large leak, but enough to feel the e-liquid on the cigarette when using.