Ive been away from the vape world awhile. But i really need to kick these cigarettes. When I last vaped, the zennith 2 was the go to tank for mtl. Has anything surpassed it yet? I was trying to replace the o rings as they are all old now, and i see that most of my g to stores are gone. Figured it would just be easier to buy new tanks at this point. But I am so out of the loop these days i could use advice.