My set up is all kr808-d. I've got regular batts 280mAh, XL batts 380mAh, a 5 volt direct pt, a 3.7v mod box, and waiting for my vv mod box. I love to get the big, huge hits, perhaps on the warm side. Recently I've been stuck on the dual coils, (awsome clouds!), but have read a few threads describing some monster hitting singles, (i think they were 3ohm) not sure if they vert or horizontal coils or if that even matters. Any suggestions?