Did the plastic ones always come with a little rubber seal for the ball to rest on? These are missing on two of my boats. I ordered some but I'm not sure how long they stay in position. I was thinking about gluing them in place.Put a new style plastic one in my sunfish, first time out the pins fell out and the ball was gone. Bought a another new one and it did the same. Found this old style in brand new condition and it works great, salt or fresh water. Most sailors like the new style better.