b = 80;
h = 170;
d = 84;
w = 4;

// Mooie ronde gaten
  $fa = 10;
  $fs = 0.4;
  $fn = 100;
  
   

difference () {
    difference () {
      
        translate ([0,0,h/2])
            cube ([b,d,h], center = true);

        translate ([0,-d/2,h])
            rotate ([30,0,0])
            cube ([b+1,d,h/2], center = true);

        translate ([0,d/2,h])
            rotate ([-30,0,0])
            cube ([b+1,d,h/2], center = true);
    }

    difference () {
     translate ([-5,0,h/2])
            cube ([b+2,d-w,h-w], center = true);

        translate ([0,-d/2,h-w/2])
            rotate ([30,0,0])
            cube ([b+1,d,h/2], center = true);

        translate ([0,d/2,h-w/2])
            rotate ([-30,0,0])
            cube ([b+1,d,h/2], center = true);
    }

  // uitsparing voor snoer 
    translate([0,-d/2+1, 15])
     rotate([90,0,0])
      cube([30,12,10], center=true);
    
  // Uitsparing zijkanten 
   
    translate([-40,0,,65])
        rotate([90,0,0])
        cylinder(h=90, r=20, center=true, $fn=100);

 // schroefgaten
    translate([-b/2 + 20, b/2-60, h/2 - 1]) // rechter gat
        rotate([0,90,0])
        cylinder(h=b+50, d=4);
    
    translate([-b/2 + 20, b/2-20, h/2 - 1]) // linker gat
        rotate([0,90,0])
        cylinder(h=b+50, d=4); 
 
}

 //  PLAFOND 
translate([0, 0, h/2 + 34])
cube([b - w, d - w, 2], center=true);

// buitenrand 
 translate([-b/2, -d/2, 0])
 cube([w, d, 10]);