That was one of the true statements regarding coil compatibility. The Protank 3 Mini is a great tank but slightly on the small size and as you mention did not take the T3s coils as the Mini takes Dual coils. The dual coils are compatible with a wide range of tanks though, and that is a good thing, on the down side, the users nicotine intake rises as rom my experience, I noticed I was vaping the same amount, and there was no drop in vaping due to the higher nic intake. So single coil T3s it is for me, and found the more durable tank ( Arotank II by smoktech) I was looking for. I have a juice question and I fear starting another mess