Dear Brethren of the seas, if you could lend your expertise on these questions:(1)My Mac 26 S has no way of locking the centreboard in the down position. I must rely on gravity and hope. (that it’s all the way down and that it stays down !)Is this standard?(2)It also appears that the centreboard does not swing down perpendicular to the hull, when the up haul is loose the blade appears to be at a 60 deg angle to hull i.e. 30 deg off vertical. Is this normal?(3)If this is not normal is it a common problem and can it be cured easily and how.ThanksMG.