hi matt, the black bands are measured from the top of the front beam. therefore you need to allow whatever the distance is from the top of the beam to the bottom of your mast rotation point , and measure from that.

Brian Partridge
STINGRAY 580 "Fantasia"
A Class 585 "FHARKEN A"


YOU CAN'T POLISH A TURD
BUT YOU CAN ROLL IT IN GLITTER!!!!!