Prime Easy Tune Cam Washers make it super easy to move the cams laterally for fine tuning adjustments. 

If you have a Left Tear, Slide the cams to the left and a right tear slide the cams to the right. 

There are three washer sizes. 0.295, 0.265 and 0.235
These have dots marked on them (3, 2 and 1)
You should pair a 1 and a 3 washer together or 2x 2 dot washers to sit down the centre.