I greased the GP today and I have 4 UMI Roto joints in the rear control arms, 2 on the UMI conversion uppers and 2 on the UMI lower control arms that I installed 4 summers ago. The Roto joints needed very little grease which means the grease I put in last summer didn't go anywhere and that means the Roto joints are in great shape and have no play in them. I'm not that gentle on my GP so I think those Roto joints are a quality product and really do the job they are intended for.....🙂