Yes, sounds reasonable. However, the damage to the seal is from an interference issue as I mentioned above. You are at a point where disassembly is required to examine and verify the cause. So choose the worst seal and begin with that. Its possible that the interference between the retainer and guide is enough to actually "shine" these 2 parts as well, so look for tell tale signs of contact between those parts. You may see other evidence of contact once you have them apart.
