i have a dyno tune dry kit on my other bike (03 zx 12) i installed it this past winter (no purge) it works great,i put a bottle through it this morning,somewhere in the neighborhood of 15 bottles so far,there is a screen on the intake side of the solinoid,get rid of it,early on after changing a jet,the screen got lodged in the solinoid,holding it wide open,at that point i didn't even know there was a screen there,until i took the solinoid apart to try and find the problem,other then that,i am very happy with it
i am using a few other dyno tune items,a square digital pressure gauge on the busa,a round digital gauge on the 12,i needed a second 10 lb bottle,to transfer to my smaller bottles,the price was right,and it has a gauge on the valve,almost forgot,i am using a dyno tune solinoid as a safety on the busa (because of the 2 dial)