I'm running a kbox 120 with lg he4 batteries, and a vixen tank. I came across some playboy tc clapton coils on sale and bought several boxes. Mostly .3's and a couple boxes of .5's. The .5's fire great with great clouds and flavor. The problem is the .3's just don't fire anywhere near as good. They just don't ramp up as well. I have seven boxes of these things so I'm wondering if I need better batteries or a bigger mod? Any help would be appreciated. Thanks