There were only two of the smaller cups that were still connected to the pedestals. In part for simplicity and--in part because I'm anal about symmetry--I cut/ground them off. The only cups still in place after the changeout are the large cups, 2 on each side.
I did a little bit of research about the risk associated with not having the cups, and what I found was that there is more of a risk of the bushings sloshing around and eventually tearing without them. That said, I talked to the guys at ES and they basically said that this is not as much of a concern from their bushings. In fact, not having a flush mating surface (such as too small a cup) for the bushings can cause them to age more quickly around the perimeter due to increased loading on the outside edge.
Also, from practical experience changing them out (and the mistake of removing ALL the bolts at the same time) I found that it is actually pretty difficult for a solid body to shift much at all on any single body mount. In other words, I'm pretty confident that the 12 mounts will hold the body in place when properly shimmed.
Do you think an air chisel would take the cups off pretty well, in the case of the smaller ones?
