$fn = 200;

    // plaatje
difference() {
    translate([-56, -0, 0])
    cube([25, 27, 4]);
       
    // gaten
 translate([-45,6,0])  
  cylinder(d = 4, h = 27, center = true);
    
    translate([-45,21,0])  
  cylinder(d = 4, h = 27, center = true);
    
    
}
        
    // halfronde beugel

    translate([0,22,4])
    difference()
    {
   translate([0,-8.4,0])
    rotate([90,0,0])   
     cylinder(d = 66.5, h = 27, center = true
        );

 // middenstuk er uit
    translate([0,-8.5,10])
     rotate([90,0,0])   
     cylinder(d = 66.5, h = 7, center = true
       );
        
        
    rotate([90,0,0])
       cylinder(d = 60.5, h = 47,
          center = true
     );
       
           // Onderste helft verwijderen
     translate([-45,-35,-69])
        cube([100,70,65]);
      
   // extra stukje weghalen rechts
        translate([29,-22,-4])
        cube([30,51,11]);       
        
    }
      translate([30, 0, 10])
    cube([12, 27, 4]);