Hi. I've just ordered a new sigelei 50w box mod because my trusty old Zmax keeps saying 'no load' with my KF+, RDA, and an old evod. It's just not recognising any atomiser attached, but the coils are fine. Is there a solution here, something to do with the gold coloured centre part of the 510 connector on the sigelei perhaps? There was a nano second last night where I saw it reading resistance but I've not been able to see that again. Has to be said it's had a few hard drops recently.