Dry/wet knob for combinators
Like a dry/wet control for the combinator device, it would only be active when something is connected to its audio inputs of course (grey it out or something when the combinator is used as an instrument). When turned hard left, it only returns the input signal, and when turned hard right, it returns only the processed signal. It can be placed right to the bypass/on/off switch, it doesn't have to be larger than the CV knobs on the back. I would find this useful in soo many situations.