I HAD the safeair kit and would recommend buying the kits from them, if you want the Dynon AOA tube. They include everything AND show you how to do it. Price is fair.
BBBBBUUUUUTTTTT, what I really would recommend is going with the GRT setup instead. Hey just look at my location, OR ASK A GRT OWNER if you want to know why. I believe in supporting local bizznass'z and GRT's get kick-a@$ reviews.