Very difficult to install, there are two springs (inner and outer) that need to be removed and put back on when changing it out. The outer spring need a special tool ($20) but the inner spring also needs a special tool which I could not seem to find.
Long story short, after about two hours of messing around with other tools I finally got it back on. There are a few videos out there on replacing it but none of them seem to capture this stupid design. It obviously needs the spring to make it water tight but they could of just used a different non-tool specific one…