What is the lowest voltage your M65's register when they fire? I know the specs state that it fires as low as 3 volts and I've read that it only registers down 3.4, but the lowest I've seen mine register is 3.6 when set to 8.5 watts on a 1.4 or 1.3 ohm. Not a big deal just curious if it is a device limitation or truly erroneous. Wouldn't exchange it either way, merely curious. Thanks for the replies.