Done that myself a few times, I've found you just need to pinch the top cap, don't tighten it down too much, still doesn't leak and makes it easier to unscrew.Agree the Pico Mega makes zero sense. Why bother to get something bulkier with the same tank limitation? I like my Serpent mini as well. My only issue with it is sometimes it's tough to get the top off to fill and I end up unscrewing the entire top with chimney and loosening the glass. I wish the top cap was just a little bit higher to make grabbing it easier and not end up loosening the whole top assembly when refilling.
That Goblin does look nice though, I would have to get the extender kit but then, wouldn't it just become a Merlin. I'll be going with the Serp 25 and pop it on a ipv 6X
And everyone is keep an eye on youHmmm, I'm interested. I'll be keeping an eye on this one.