It really is not too bad to install. Make sure you get the usual 1" long crusty piece removed underneath as seen here (you can also see how far on it goes).
https://www.flickr.com/photos/advance-design_parts_co/13115851445/in/set-72157631868452754
Use some personal lubricant or similar and set it as shown here if you want it "factory."
https://www.flickr.com/photos/advance-design_parts_co/8129474877/in/set-72157631868452754