Are dust covers much trouble to remove/reinstall? :-)
Sentimental spammage.
The tiny horseshoe spring clip on the right side of the axle rod can be a problem because it's so small. It took me about an hour to do the first cover, and ten minutes for the second. I needed my watchmaker tools to get it done.
First, I put a clean yellow cleaning cloth on my lap, so I could find the clip when I lost it (a dozen times). It was no fun looking for it on the floor, which I did the first time. Rotate the clip so both "legs" are pointing up. Put the tip of a jeweler's screwdriver on both legs, and push down on both until the clip comes off, and falls into one of the many crannies on the upper. Turn it over, and let that little clip fall on that yellow cloth.
Pull the axle pin pit about 3/4 of the way. That lets you remove the coil spring, and slide off the old cover. Slide on the new cover and spring, making sure to wind the long leg of the spring once, so it's pushing against the inside of the cover, while the short part of the spring pushes against the upper receiver. Push the pivot rod all the way on, and test that the cover works properly.
All that little clip does is prevent the removal of the pivot rod. Take some teeny tweezers, and try to put the clip over the little groove in the rod. Push down on the middle of the clip until it pops into the groove. It does not take much force, just a lot of dexterity. You're done.
It's not a tough job, just everything is so tiny.