I buld coils just fine the problem I have is with dual coils every time I attempt one I can not get it to fire. I try each coil on its own and it fires just fine. But when I try to use both nothing. The same thing happens when I try to do a twisted coil wrap. I'm guessing it a battery issue seeing how I'm using a mechanical mod. I'm using trustfire batteries right now but I got some better batteries coming. Just wondering if that will solve my problem.