I sailed my Capri 14.2 for the first time on Saturday and had a big problem keeping my centerboard down. The bungee cord that is attached doesn't seem to have much tension in it. I tried tying a knot in it to take up some of the slack but it didn't do much good. The water near the shores of the Chesapeake Bay are shallow so I need to have it be able to come up when necessary. Is there any down side to increasing the strength of the bungee cord or are there any other tricks I should know about ?