I have several Isub and Isub G tanks using .5 ohm coils. When i put them on my Sigelei 50 watt boxes the boxes they do not regulate to the wattage I set to (example 10 watts) when i vape its like they are at a much much higher wattage and burn the cotton real fast. When I use them on my Isticks 30/50 or 100 they work fine. So what I am trying to say is the Sigelei's seem to work like an unregulated box when the Isubs are attached. Other tanks like my Tritan and my naultilus all work fine. Anyone else ever have a problem like this?