Well apparently there is a lot of debate about which way to plumb your airlines. The way I see it, is that the guys that used a tee have no argument that it's better, just that it is "good enough", and it has worked fine for them. That's fine, I don't care what they do. I can see the advantage of keeping them seperate, and if the parts are there in the kit to do it that way, why not? Is it that big of a deal either way for most people?... apparently not. I just don't see the stubborn defense of the ones on the "tee" side of the debate, can you honestly come up with a reason why it is actually better, aside from being easier?
Could you get by with running "d" tires on your truck? Probably for a while at least, but would you?
Could you get by with one strap (or chain) on a tractor? Maybe, and it could "work out" for you for years, but it doesn't mean it's better... just easier.
If nothing else, at least I learned something from this thread. If I had purchased an air spring kit before reading this, I don't know which way I would have gone. I may not have thought about the transferring of air from one side to the other, and just thought like some of the others... "who cares, I don't need fill each side differently" and maybe I would have tee'd them together. So anyway, thanks guys for the debate.