Slicer failure

$fn=50;

WALL_THICKNESS=5;
WALL_SPACING=1;
WALL_HEIGHT=50;


LEONARDO_LENGTH=68.7;
LEONARDO_WIDTH=53.476;
LEONARDO_HOLE=3.175;
LEONARDO_THICKNESS=1.7;

HOLE_CYLINDER_SCALE=0.95;
HOLE_CYLINDER_LENGTH=LEONARDO_THICKNESS*5;

LCD_LENGTH=80;
BOX_LENGTH=LCD_LENGTH+WALL_SPACING+5;


BUTTON_HOLE_DIAMETER=22;
BUTTON_HOLE_HEIGHT=WALL_HEIGHT-17;
BUTTON_HOLE_X_POS=BOX_LENGTH-WALL_THICKNESS-15;

LEDS=5;
LED_DIAMETER=4.95;
LED_SPACING=LED_DIAMETER+3;
LED_X_POS=LED_DIAMETER+2;

LED_OUTSIDE_DIAMETER=5.35;
LED_OUTSIDE_DEPTH=1;

LEONARDO_HOLE_POS=[[13.97,2.54,0], [66,7.616,0], [66, 35.56,0], [15.241, 50.8, 0]];



LEONARDO_DC_POS=[-1.868, 3.238, 0];

LEONARDO_DC_SIZE=[-LEONARDO_DC_POS[0],
                  12.065-LEONARDO_DC_POS[1],
                  11];


LEONARDO_USB_POS=[-1.27, 34.29, 0];

LEONARDO_USB_SIZE=[
    -LEONARDO_USB_POS[0],
    41.91-LEONARDO_USB_POS[1],
    2.8
];

translate([-WALL_SPACING, -WALL_SPACING, 0])
{
    cube([BOX_LENGTH+WALL_SPACING,
          LEONARDO_WIDTH+WALL_SPACING*2,
          WALL_THICKNESS]);
}


translate([0, 0, WALL_THICKNESS + HOLE_CYLINDER_LENGTH/2])
{
    for(hole = LEONARDO_HOLE_POS)
    {
        translate(hole)
            cylinder(h = HOLE_CYLINDER_LENGTH, d = LEONARDO_HOLE*HOLE_CYLINDER_SCALE, center = true);
    }
}


// SPACER FOR plugs
translate([LEONARDO_DC_POS[0], -WALL_SPACING, 0])
{
    cube([-LEONARDO_DC_POS[0],
          LEONARDO_WIDTH+WALL_SPACING*2,
          WALL_THICKNESS]);
}

//Left wall
translate([LEONARDO_DC_POS[0]-WALL_THICKNESS, -WALL_SPACING-WALL_THICKNESS, 0])
{
    difference()
    {
        cube([WALL_THICKNESS,
              LEONARDO_WIDTH+WALL_SPACING*2+WALL_THICKNESS*2,
              WALL_HEIGHT+WALL_THICKNESS]);

        translate([-1,LEONARDO_DC_POS[1]+WALL_THICKNESS+WALL_SPACING*2,LEONARDO_DC_POS[2]+WALL_THICKNESS])
        cube([WALL_THICKNESS+2, LEONARDO_DC_SIZE[1], LEONARDO_DC_SIZE[2]]);

        translate([-1,LEONARDO_USB_POS[1]+WALL_THICKNESS+WALL_SPACING*2,LEONARDO_DC_POS[2]+WALL_THICKNESS])
        cube([WALL_THICKNESS+2, LEONARDO_USB_SIZE[1], LEONARDO_USB_SIZE[2]]);
    }
}

//Top wall
translate([LEONARDO_DC_POS[0], LEONARDO_WIDTH+WALL_SPACING, 0])
{
    cube([BOX_LENGTH+WALL_SPACING*2+WALL_THICKNESS,
          WALL_THICKNESS,
          WALL_HEIGHT+WALL_THICKNESS]);
}

//Bottom wall
translate([LEONARDO_DC_POS[0], -WALL_SPACING-WALL_THICKNESS, 0])
{
    //color("red")
    difference()
    {
        cube([BOX_LENGTH+WALL_SPACING*2+WALL_THICKNESS,
              WALL_THICKNESS,
              WALL_HEIGHT+WALL_THICKNESS]);


        translate([BUTTON_HOLE_X_POS, WALL_THICKNESS+1, BUTTON_HOLE_HEIGHT])
        rotate([90,0,0])
        cylinder(h=WALL_THICKNESS*4,d=BUTTON_HOLE_DIAMETER, center=false);

        for(led = [1:LEDS])
        {
            translate([LED_SPACING*led+LED_X_POS, WALL_THICKNESS+1, BUTTON_HOLE_HEIGHT])
            rotate([90,0,0])
            {
                cylinder(h=WALL_THICKNESS*4,d=LED_DIAMETER, center=false);

                cylinder(h=WALL_THICKNESS-LED_OUTSIDE_DEPTH+1,d=LED_OUTSIDE_DIAMETER, center=false);
            }


        }

    }
}




//Right wall
translate([BOX_LENGTH, -WALL_SPACING, 0])
{
    //color("blue")
    cube([WALL_THICKNESS,
          LEONARDO_WIDTH+WALL_SPACING*2,
          WALL_HEIGHT+WALL_THICKNESS]);
}