So I'm just trying to gather some info on ways to lift my Coleman Yuma and so far the easiest way is to use the Dexter Axle spring relocation kit for around $50. It relocates the leaf springs from being mounted on the under side of the axle to being mounted on top. Seems like a decent option. I wanted to share a great image I found of the under side of a Coleman E3 which some of you may know comes lifted stock. You can see that it looks pretty simple with just having spacer blocks between the leaf springs and the frame. The E3 does have the added bonus of having the shocks and the swivel pieces so the spring and pivot while it flexes.