Has anyone found a reliable, practical system [commercial kit, Chinese from eBay, DIY from scratch, or just good-looking plans] for a mechanically linked dual VC, with the possibility of using really top shelf potentiometers, a dual shunt VC, or ideally, switched discrete resistor attenuators? You know, something with a belt connection, some kind of clutch, chain drive (!)... whatever. I'm not really thinking about some rare commercial product, but something along DIY lines. Thanks.
