The Duelund copper VSF are amazing caps. I just put one on the tweeters of my speakers and it has completely transformed my speakers. Never have I heard cymbals sound so real and palpable. Thanks to Dgarrettson, SNS and other Merlin owner's experimentation with Duelunds in their speakers, their excitement, I believe, has carried over to convince Bobby in trying them out. I'm not a Merlin owner, by the way. My mini-monitors are the Reference 3a Dulcet. Duelund copper VSF caps are the real deal. The Cast models are supposedly better but for a much greater price. Parts Connexion probably have the best price going now, especially with their monthly discount sale.