The Accuair kit is by FAR the best kit that I have installed but I havent installed one of ARTs new level pro kits yet, The problem with those kits is they are so expensive. I have patented a kit which is pressure based, will work with ANY size valves (because it has it's own), takes minutes to install and the retail on it is 299.99 which is far less than most of the other kits. Keep an eye out for it, i'm done with R&D and have units ready to go i'm just waiting on my website guy so I can get to shippin them.