I was at a 4x gathering this weekend and a guy I hitched a ride with in a Jeep YJ has a 2 1/2 spring lift on 2" shackles.He had the shackles first so just bought the leafs later. He said he preffered this over a 4" spring because it has less arch,therefore more flex ??? I currently own a pair of Conferr shackles. Should I get another set of 2" shackles and go with the Skyjacker 2 1/2" leafs or just buy the 4" leafs.Heck,they're almost the same money.