I took the advice of a few folks on this forum and sought out a fellow MacGregor owner to make sure I had everything I needed to sail my Venture 22. To my surprise, the owner told me that the earlier models (mine is a 1984) did not have the valve/water ballast system. Does anyone know if this is true and if so, what year did they start using this system? I'm embarrassed to admit I have looked for this valve on my boat and have not been able to locate it.