heres the start of a  new live rig mixer project/product. six inputs &  four mixed outputs. 1 – main (mono) 2 – echo send. 3 – reverb send. 4 – cue send. the echo & reverb sends can be killed or momentary pulse switched using the keyboard switches. the key switches are light to touch and quite springy . very easy to play. the cue send switch has a playable momentary half to its on action also. the four mix amps will be my clone of the two tube pultec MB1 amp. the whole mixer is totally fat. no flab. tuned for maximum playability and simplicity.