Im currently building a 70" 44 for my JK and have been considering my options for balljoints. I was interested in the ball joint eliminators but after looking into the Dynatrac Prosteers, I realized they are basically the same concept with some improvements. The prosteers look like they use the same type of replaceable spherical bearing, but also have seals, are greaseable and have adjustable preload. I think for the cost of the BJE that its worth it to spend the extra cash to get the prosteers.