I'm in France, i already paid heavy shipping cost, round trip will be too expensive. Anyway, thanks for this offer, really appraciate it.
There are not all warped but i have double check and there are lot warped inside, some are just little warped and some more warped (see video below).
It just that if i had know I would not have bought them. It's not what i call "Mint"chips.
I think i'll try to unwarp them with woodclamp but i'll need to spend some more bucks in a woodclamp (and shipping cost) and i'm not really happy to try this technic on these kind of chips.