If that .5 you are talking about is half an inch, i would not use it.
Changes the leverage on the clutch fork.
When i did my TKO, the promotion guy wanted me to put in a washer he sent that was about 1/8 thick to extend the ball, so if 1/8 changes things enough to actually warrant a change, i'll assume that 1/2 an inch is going to make a big difference.