Mix-Z

Mix A in 1 Mix A Gain 1
Mix A in 2 Mix A Gain 2
Mix A in 3 Mix A Gain 3 Mix A out
Mix A in 4 Mix A Gain 4
Bus Mix Switch (off/on) Mix B Master Gain
Mix B in 1 Mix B in 2
Mix B out (Master out if Mix A not in use) - this socket positioned in the centre of a dice 5 layout
Mix B in 3 Mix B in 4