I've got an 85 or 86 Bianchi with a campy headset. I have noticed a bit of a "tick" in the headset while pedalling. It seems to increase with the degree of pedal pressure applied. I wonder if anyone else has experienced this and if it may indicate a need to service the headset. I don't want to over-react and pull it all apart if this is indicative of nothing. However, if there is a problem, I will want to get in there and fix it. Any ideas?