i can't think of anything that hasn't been covered here
I can
This is the distance from the base of the limb (where it meets the riser) to the string. This measurement is taken at a 90 degree angle to the string.
This is true IF you have a dual cam bow.
But if you have a single cam or hybrid bow you need to run some fishing line from the top axle to the bottom axle and measure to the fishing line as most single have a large cam and a smaller idler wheel so measuring to the string will give you a false reading