My Catalina 350 has mid boom sheeting, with a single-ended mainsheet. Usually when sailing, we have the mainsheet on the starboard cabintop winch. However, there are times when we must free up the winch and need to cleat off the mainsheet. Right now, there's some sort of V-cleat on there (I'm thinking it must be a Ronstan), but it won't hold worth a darn. What should I replace it with? I could get another Garhauer rope cluth like I have for the rest of the lines. Or I could put a cam-cleat on there, or something else. Any ideas on what will work best? I guess ideally, I want something that I can screw into the holes left where the v-cleat is, so I might be somewhat driven by that.