Re: Prothane Strut mounts
It will involve compressing your spring and lowering the strut down out of the tower. Unless you have a good imagination, you wouldn't notice a difference. Hang onto them though and put them on next time you swap struts. They would be worth putting on with other work that requires the same uninstall, but I can think of plenty of other things I'd rather spend a Saturday afternoon doing.
Though, if you are doing the ball joints, it's really not that much more of a big deal to compress your springs and drop that strut down. Depending on the hardware you have on top though, you may find it easier to completely remove the strut from the car.