I'm getting a little oil into the points cavity on my 1968 Shooting Star, it's been 30 years since I had one all apart & can't remember, can that oil seal be removed & replaced just by taking the " Outer" cover off & the advance mechanism or does the " inner " cover need to come off too?? Retimed/ tuned & it's starting easy again but to much oil getting in the points. Thanks, Glenn.