Nice fab work, cool to see an idea go from someone's head to on the bow!
Have you tried padding your string loops with yarn? I have a recurve that I just couldnt tune the "loud" out of a while back. No matter what I did with the brace height, nock fit, string silencers, etc the noise just wouldn't dampen. Finally tried to pad the loops and man did that make a difference.
Get yourself about 5 feet of Merino wool yarn, split the string 1/4" below where the limb makes contact with the string and insert one end of your yarn. Now simply start wrapping the yarn around your string toward the loop. Once you get to the loop pass the yarn through and begin wrapping in the opposite direction until you get back to where you started. Insert the tag end back through your string, trim the excess and repeat on the other end.
Kuddos on the silencer, but you might consider giving this method a try while you're in the tinkering mood.