I have been reading this link closely as like KenBlake I have a 2004 Ballabio and the shifting has really detracted from the enjoyment of the bike. Lots of false neutrals and a lot of effort shifting. I am new to this bike and only have about a 1000 miles on it. My hope was to put off pulling it apart till winter. However, I found this trickle of transmission oil which looked like the area of the lever seal but turned out to be the eccentric just above it. The nut was loose and trying too tighten it was turning the eccentric which by this time was at anyones guess. I tried to tighten it figuring I had a maybe 1 in 10 shot at being close. It wasn't close and now would not go into 3rd. So I pulled it apart, adjusted it to ~0.032" at it closest point and of course changed the oil. It all seemed okay otherwise. I also cleaned and greased the shift mechanism. I only have about 30 miles on it but it is much, much better. Time will tell!