I did a search on this but found no results, how important is it to replace the clip on the axle that is inside the birfield? You know the one that breaks seperating the axle from birfield. Where is a good place to get them and how do you get them in there? I didnt replace it on my 55 when i switched it to disk breaks a couple of years ago and havent had any problems. But i am doing my 40 and was curious about it, should i go and put some on my 55 too or just stick with what i have been doing?