no problem... use thre rollers if you like but the jet i would highly recomend.. the airbox means its a little less sensative to roller change but will deffo rev out better at low speeds with the right rollers.. its all about try try and try again. ive got it wrong a thousend timews hence i know the right way. just trying to save you some time and me not having to say "told you so" for the 1000th time on here good luck to ya.. only up the road so if you get stuck pop down an ill sort it for ya (for a drink of course)