Working on the skis on my Invader today, I found that the leaf spring rear bolt was seized in the aluminum bushing inside the spring loop on 2 of the 4 skis I tried to take apart, and one that did come apart was trash. I found that I have a reproduction suspension shaft made for JDs that is correct for this, so if anyone needs these, I can cut some to the 2" length for the leaf springs.
Matt