If your looking at rtas, check out OBS Engine Nano. Had mine several weeks playing around with different builds & flavor is great. For simple round wire close afc half way & you'll get a very tasty vape! Currently have staggered fused Clapton installed .25 at 47w & enjoying it. Single coil better for flavor chasing. Blazer mini giving me great flavor, too. I prefer .6 coil.