Has anyone used Prothane (or another brand) and not used the thrust washers that came with the kit? The reason that I ask is that for some reason when the thrust washers are installed on the arms/bushings, they are way to wide to go into the mounts. Both on the frame and for the upper arms on the differential housing. I am probably going to have to call Prothane in the morning but if I don't have to use the bushings, I wont. The factory rubber bushings didn't use washers and I can't imagine that my cruise night/head turner driver really NEEDS them? Thanks.