I have an 07 ultra classic with 16,600 miles. recently I noticed an oil liak on the garage floor. Thought it was the outer primary cover and just replaced that gasket, derby cover gasket and of course changed the oil in the primary. After cleaning the underside very well, I have found it seems to be coming from the inner primary gasket area. Is this something a person with limited experience can handle or am I getting in too deep? What approximately is involved?