[DanEC]

I used thread locker on my set screw (I think Patrick suggested this once). I don't have as many miles on mine yet for any other problems to have cropped up. There is a certain amount of play in the linkage before all the clearances are taken up. Because of my rearward seat mounting I unscrewed the clutch pedal rod until the pedal arm was against the rear of the floorboard opening - basically I have no free play that way (not talking about a minor amount of throwout bearing free play). But, I don't want to move the brake pedal back that far so it still has free play due to the linkage.

The bolt that secures the clutch arm to the shaft should be a through bolt as
Pete describes. I removed my assembly and it was per the diagrapm. The set screw at the clutch bellcrank does just seat into a groove in the splined shaft.