I'll need to get reading up on rebuildables - don't know the first thing about it yet!Purely for the rba section tbh! Stock coils will give the same experience I'm afraid which is why I suggested the apex too. Problem with these subtanks is the latest and greatest almost demand above 50 watts to get the most from them so rebuilding can make a lot more sense. The crown tank is supposed to be awesome but you'd need to throw more power at the stock coils than what you have available. It took has a rebuildable Base though so could be worth a look.