No worries mate, you should like it it's a great value for money tank. I don't use it at silly wattages though, mostly around 20W on the middle air setting for a nice restricted lung draw and only go up to about 25W if I open it up to the biggest airhole. I've only had really thick juice in there so far though, way thicker than I'd attempt in my beloved Kayfun 3.1, so could probably go higher Wattage with thinner juice that will wick quicker. I've not used the RBA deck yet either but it looks like it will make for a nice easy build for Ni200, just wanted to compare the stock Kanthol and Ni200 heads before I play with the RBA. I love the flexibility of it, on the smallest airhole it's actually a tighter draw than my 3.1's set wide open and can be run right down at typical Kayfun sort of power levels. It does seem to like it slightly higher though to get the flavour out of it. I can't really make a comparison to a KF4 for you as I've only had a play with a really bad clone and never got a consistent leak free vape out of it even with Kanthal.