Tie it down
I have a H240 and have tried using a wing-nut on the rudder only to find that I can not tighten it enough to prevent the rudder from moving up, especially when sailing. I previously had a H19 and using the wing nut was no problem but no such luck with the 240. Using the down haul (and up haul) for the rudder has turned out to work really well. I admit that initially I found it bothersome to adjust it all the time, but now I really appreciate the flexability of it. My slip is located in a channel which has changing water levels and its great when I can adjust the rudder to accomidate the draft. Many other sailors are stuck in their slips for much of the summer. (They have been druging a new channel all summer!)I have worred about what will happen if (when) I his something with the rudder, but I guess something will have to give. Not sure on your question about the side plate, but I am sure someone more knowledgeable than I will comment on that.Good luck on what you decide.P.S. Had to pull the boat out of the water yesterday as winter is on it's way here in Wisconsin. Starting to dream about spring already!