You analysed a hundred million million failures to arrive at this conclusion?
it was my own opinion so far of the percentage/probability of the times a Zenith might end up leaking for most people
Maybe if you use ultra high PG, if a seal fails, you got really unlucky & a dodgy tank/coil etc.....
But in general, any leaks will be down to user error - often failing to close the lid after refilling imho
Sounds impossible or just stupidly forgetful - yeah I thought so as you can't forget to close it unless you are that daft
Erghhh - well like I said I thought so too but I have done that a couple of times when I had a mental blackout or something
and that is the only time it leaked on me
You have to be rather incapable to not be able to change the coil and fail to align the lug/coil correctly
(and not notice the lock/AFC ring gap when badly refitting the new coil)
Even over time swapping tanks/mods the lock/AFC might have somehow loosened slightly - still no weeping of juice at base
You don't need to drain the tank when changing the coil - well unless you change the coil with tank upright than inverted
(again user error)
The lid has moderate resistance to open, unless the seals fail over time I can't see it becoming so loose it would open on its own
or work itself open in your pocket/bag, nah if you leave the lid open you will soon be splashing loose juice about etc.....
There is nothing to remove when refilling, no lid to unscrew or drip tip to remove
nothing to remove in a dark evening outside pub, drop on floor and think WTF did that lid/tip go ????
Simply twist, fill & hopefully remember to close it afterwards - job done
ALMOST idiot proof - but alas not completely impossible due to the human element or the idiot using the thing.....
I'm no expert, far from it but offer my own personal opinions & point out any flaws I see as most stuff has flaws of a sort
I'm an expert though on certifying if anything is truly idiot proof.....