Sailing my Hobie 17, I have to change the angle of the blocks/cleat depending on wether I'm on the tramp, or out on the wire. This isn't something that can be done quickly on the water. If I leave it set for the tramp and then find myself hiking out, or on the wire, it is almost impossible to cleat. This can be very tiring sailing a six to twelve mile reach! Has anyone tried the Spinlock? Does anyone know if it might help? Thanks, Brian