I have an 09 WR450F and am looking for an oversize tank, 3 to 3.3 gallon. I've looked at Clark, Acerbis and IMS and am looking for feedback on what I should use or avoid. I have an FMF megabomb header and from the pictures it looks like some of the tanks may touch it. I don't like the look of natural, black or blue are OK and the radiator shrouds have to fit. And do they use the stock cap or their own?