Hey! Just received my Sub box mini today. It comes with a .5/1.5 ohm OCC and a rba. It was preset with the 1.5 and I've been vaping with it today. I would really like to change to the others as well just so I see how they work. My question is is that possible? Just unscrew the OCC and say put on the RBA? How do you handle the used (but not used up) OCC? Full of juice and yet not ready to be changed out or rebuilt (not even the cotton).