Why not stick with the original style infintely adjustable turnbuckles?? I've used those blasted "shroud-adjusters" on a small sailboat and found them inconvienient and troublesome, the first time that I rigged that boat (don't laugh, a 9' trimaran!) I stepped the rig before launching and tensioned hte rigging, well of course when I got the boat in hte water the shouds were now too loose. So, I removed the clevis pin from one of the adjusters and promptly lost the pin overboard! Now, how could I keep the rig standing while I retreived a new clevis pin from my spares? I did it somehow, but vowed to never again rig a boat with those "shroud-adjusters". The first thing I would do if I ever bought a boat that had them would be to replace them with real turnbuckles! I have never had a problem with the turnbukles on and of my boats that had them, and the infinite adjustability make them 100% better than the shroud-adjusters!
I realize that you have used the shoud-adjusters on your Hobie Cat, and I'm sure they worked OK, but based on my experience, they are not going to really work out on a Day Sailer, stick with the much better turnbukles as originally setup.