how is brace hieght measured on a bow?
From the deepest part of the grip to the string.
Untwist string to lessen brace height and twist string to increase brace height with a flemish twist string. Move brace height in 1/8" increments and find the sweet spot on your bow. It will be quieter and throw your arrow the best in this spot. Measure the final brace height and remember it in case your string stretchesl. If your string slaps you low on the wrist , the brace is probably to low. Just a place to start.
This should help.
(http://i16.photobucket.com/albums/b22/Stalker58/BraceHeight.jpg)
Stalker