When a stick is said to be so many pts head heavy or light do they mean grams? If so does it mean that a 2 pt head light stick would need 2 grams at the bottom of the handle to make it even balance? Also is it assumed that the point of measurement using a balance beam is the geometric center of the stick? ie. if the stick were 2 foot long you would put the stick on a balance at exactly 1 foot from the top. If it balances its said to be even. If the head goes down its said to be head heavy? Thanks!