BC52,
I could be wrong but I think the axle wrap thing is a bigger problem for the mini truck guys running the Air Over Leaf setup because they pull out all the leaves except for the main leaf to get it as low as possible. I'd be interested in hearing more about your setup and seeing any pictures if you have any. How do you like it?
I was also interested in the front air over leaf thing but I'm worried about all the bad things that could happen if I were to break a front leaf spring while driving.