We have shared our experiences with stuck centre boards and the various ways to loosen them etc.On the O'Day 23 series 2 (mine is a 1902) the line which raises and lowers the centre-board is in the cockpit. My question concerns the tube between the cockpit and the hull throughwhich the raise/lower line is fed . What are the details of this tube?How is it secured to the hull and how is the plastic "lead-in" on the floor of the cocpit held in - is it secured with 4200/5200 or it it part of the tube?Has anyone removed/repaired this tube and knows the details? The reason behind my question is that Bullocks Cove, where I moor my boat is silting up and at some moon tides the depth is not enough. Consequrntly the boat sometimes sits on the sand. The sand gets into the centre-board trunk and the board does not drop. The tube which leads the line to the centre-board is, acording to the drawings, straight so there has to be an easy way to help drop the board when it gets stuck. So I am looking at ways to use the tube and push from the top with something which will go around the line - i.e. another tube which I can nudge/push on when necessary. I am not thinking about removing the existing tube ---- just trying to think of a way to help gravity do its thing.Any ideas/suggestions/concerns ---- I know this is a problem we all face so I hope someone out there has come up with a brilliantly simple idea.Thanks in advanceJames