So I built my first set of coils the are reading .584 ohms on my mod and the volts when pulsing it at 50 watts to test it and my volts are 5-6 volts on 3.7 volts batteries (I think I wrappd too many times) on the Coil master jig thing the 40. Second I used the 30, 8 wraps and got .368 ohms I still feel like it' gonna really drain my battery but I got both coils heating nicely