1991 Phazer ST is wearing the sides of the front tips of the slider. I thought I had a bad track clip but could not find any and it is the same on both sides. I run my track looser than spec but tight enough not to ratchet.
Rails are good. If I had an alignment problem I figure it would wear on the front on one side and the rear on the other. I'll be changing sliders soon and can check to see that the bearing is good and the drivers are not sliding on the shaft.