when I first started getting used to the
tank I scraped off alot of the inner o-ring... I was lucky enough to get free replacement rings
but honestly I haven't needed to use them yet... my top inner o-ring is pretty bad but it still doesn't leak
if you are punching your holes to low they can cause alot of leakage... I always thought I was doing
it right but it was always leaking by the battery end... I punched them a littler higher and it works fine now
not sure if that's your problem tho