My '07 GS has been running smoothly! During a recent final drive fluid change with 26K miles on the clock I pulled the drive shaft off for the first time checking the universal joints. The transmission input end moves smoothly in both planes. The final drive end moves smoothly in one plane and the other one has a very slight notchiness when moving the joint through the center. Should I bite the bullet and ship the shaft to Bruno's for overhaul or is there a certain amount of notchiness that is acceptable?