Is is safe/recommended to sail with the centerboard locked partially up when crossing over 3 or 4' foot deep spots? Is there a way to measure the angle of the centerboard (45 deg, 20 deg?) besides having line markings? Has anyone done this? Looking to purchase a 260, the only down factor seems to be the 6' foot draft which is quite deep considering the boat is rated for inshore sailing. Is there any upwind performance in light airs without the centerboard all the way down? Thanks