A friend of mine has one on B2 axles. It works great. Very impressed. Cycles up and down with very little growth. Side hills good and climbs like a billy goat.
This is one thing that really noticed when swapping to this chassis. I really like that it doesn't have much of a change in wheelbase when you cycle the suspension. I have never had a crawler the doesn't squat all the way down when i dig. It was odd at first but works great and i think it helps it with tire lifting also?