They all work to a degree, but the lightest combo is obviously going to have the least effect on tune. Over the years, I have tried just about every silencer out there, and have come to the conclusion that plain cheap acrylic yarn puffs from Walmart are just as good as anything. Yes, brace height is important, but location is key. String ocillation is a function of physics. Google heterodyning. A silencer on the 1/4 and one on the 1/3 points cancel out the vibration nodes and in my experience, work well for all bows.