Hi, I went to adjust the eccentric on my 1996 Cannondale RT2000 and it would not budge. Bolt backed off easily. I tapped on the bolt to try and loosen with a rubber mallet. The spanner pin holes on the exccentric look a little rough. I have a Park Tool Green spanner that will fit but, because of the previous wear mentioned earlier, I notice the spanner can slip out when i put some force into it. Would it be wise to spray some PB Blaster into the eccentric and wait a week or too for it to do its stuff? I suspect the eccentric hasnt been touched in years. Thanks Ron