Pretty sure I saw some where there is a bungee cord used on the swing keep to keep it down but allow it to swing. My 170 does not have any bungee cord, it doe seem to have places to put it. I could not find any pictures online, but did see on the 18 it appears they have something run from a loop infront of the keel back around a loop behind the keel and then to the bail on the keel. There is no indication of a bungee cord here on the parts lists for the 170 or 18. So can some one clue me in what it looks like and how it is attached on the 170? Thanks!