If you have ever mixed or tried to adjust music in a dark room and/or on gear with missing knobs, you know the meaning of frustration. the ghostly knob fits on the rotating EQ , sliding volume vontrol as well as the cross Faders. the ghost stands up to glide across the faders and pop the back off for the rotating adapter. the top of the ghost head points to the volume level. when printing lay them on their ghostly faces. increase part scale of "fader2" 1.07% print "backcap" at 1.05 % modeled using inventor pro student printed on printrbot plus using pla .3mm layers 10-15% density honey comb infill 3 top and bottom layers no support generated