That ring is a PITA, you have to start clearing grease until you see the open end. I use a pick and sometimes a flat head and seems to work. Since I have learned how to drive over the last 4 yrs, I haven't had any problems with CV joints. As for torn boots, the RS has had a torn boot for years, I just fill it with grease every once in a while and let it ride. Going on 5 yrs, no problems. Same with the prop shaft boots, although it is starting to make noise