I have a Nacra system on my Mystere. I still have the plastic cleats but whipping the area where the pull down line sits works great. I'm not using the Nacra blades right now but the holes have been moved forward to allow them to kick under. One other nice thing about kicking them under is any grass that gets caught on the blades works up and seems to clear itself fairly well. I don't have the set screws. I small pieces of carpet that I contact cement in down there. If I want to rake the blades back I can add another piece right over the top of the other one. It also cushions the blade as I tend to pull hard so they slam down and if it's a little sloppy there you can put a slightly wider piece that will snug the blade when locked down. The only other thing I did was run the pull up line internally in the steering arm.