ive used mostly 510 attys and cartos so far. i had a 306 once very early on but burned it up in a couple days of obvious misuse. now i find myself with a couple and i dont want a repeat performance. ive got it on my provari and primed it with 5 drops and it started leaking. the leaking seems to have stopped now but tell me, whats the secret to these and the best way to use them?