The Tonewings™ gave my late 19th-century Tyrolean bass a new level of openness and clarity that I had not realized was possible! A problematic wolf tone vanished instantly once Vladimir applied the wings to the corresponding hot-spot on the top of the bass. I’m intrigued by the simple physics principles at work and delighted by the clever, non-obtrusive design of the wings themselves. I’m convinced that nearly any bass – new or old – would benefit from having a set of Tonewings™ installed. Thank you, Vladimir!