ODI lock on grips

First time using these on a 214 yz250f. What do you guys do with the throttle side spacer/ washer? Does it get used or? Otherwise things seem pretty nice. Guess will see how the hold up under use. Also noticed that the instructions recommended the A cam but you could also use the J cam, and ironically the J cam was a bit wider, and therfore had less left to right side play in the throttle tube housing even tho A was the primary choice per the directions.