I just finished the upgrade on my 245rk4 the past week. First it is a lot easier when you have 4 hands. I jacked the rig up on the first day by myself. My friend Bettylou helped me the second day. Disassembled the right side and installed the wet bolts, CRE3000, removed all 4 tires and repacked the bearing and replaced adding new seals. Rotated the tire and completed the right side. The second day I was on my own. A bit more difficult trying to operate the jacks to line up the bolts. But the let side was completed on my own. Glad I repacked the bearings. The plastic bushings were already wore with only 3000 miles. Have not toed it yet but I am glad I did it.