I did a pretty extensive search, and most information on expression pedals is either specific to single situations, or is somewhat older. Perhaps we can make this the go-to thread for expression pedal information, seeing how sparse information is. If you have any useful information, please add to the thread. Some questions I have are: Do all expression pedals work for all single unit effects with expression inputs? Which expression pedals have the most even effect in their sweep? Which ones are well built? Should I stay away from a particular one? If so, why? Is the Yamaha FC7 suitable for effects units?