//    
//    button_shape_HX
//    button_shape_HY, as in button-shape-super.inc.
//    button_shape_HZ, as in button-shape-super.inc.
// 
//    button_max_disp_Y, button_min_disp_Y = range of Y displacement
// 
//    button_hole_clearance = width of gap between button and hole