The rba is the one that comes with the big baby tank, I'm new to rba and have never built a coil, just bought the pre made coil wraps and wicked them. I'm just trying to make it so it will fire up. I run my box low like under 30 watts, just like to puff and not blow huge clouds. The coils I have in it now are pre made wraps that came in the rba. It's a duel coil rba. My box fired it in the store once to test it and once we put cotton and juice in it would not fire again, nothing grounding out on deck or anywhere else. They said it could be cause my box won't go low enough. The rba fired on their boxes and not mine