alignment
I could be wrong in the following. but here goes any way. if you were to place a tape on the lower and upper limbs where they meet the riser. measure across the diamenter of the limbs find the center and place a mark there. now measure 3/16th to the left of that mark on a right handed bow and put a mark on the tape place a ruler on the riser at the burger button or rest mounting hole your string should intersect all three marks. most risers are not perfectaly square or flat there fore it is hard to get a reading with a laser or those string centering guages
I could be wrong in the following. but here goes any way. if you were to place a tape on the lower and upper limbs where they meet the riser. measure across the diamenter of the limbs find the center and place a mark there. now measure 3/16th to the left of that mark on a right handed bow and put a mark on the tape place a ruler on the riser at the burger button or rest mounting hole your string should intersect all three marks. most risers are not perfectaly square or flat there fore it is hard to get a reading with a laser or those string centering guages