Boondockers kit and AFR gauge cost $1600 (with twin bottles and mount assembly for tunnel rails on 800 Dragon). some days I will go through 1 bottle, but have never gone through both. Don't use it too much, going to take it off and sell it this summer. Takes some of the fun and skill out of the ride. Saves maybe two digouts a day and was good for a one a day "OH SH!T" save. All in all the ride is more fun without the NOS. That's only my opinion, some have more of a need for power and the high mark. If that is you, then NOS is easy cheap and no race gas.