case_height=158;
case_width=89.5;

difference() {
    cube([case_height,case_width,1]);
    
    translate([9,35,-0.5]) {
        cylinder(2, 2, 2);
    }
    
    translate([38,7,-0.5]) {
        cylinder(2, 2, 2);
    }
    
    translate([70,7,-0.5]) {
        cylinder(2, 2, 2);
    }
    
    translate([99,7,-0.5]) {
        cylinder(2, 2, 2);
    }
    
    translate([120,7,-0.5]) {
        cylinder(2, 2, 2);
    }
    
    translate([149,35,-0.5]) {
        cylinder(2, 2, 2);
    }
}

// walls
translate([0,-1,0]) {
    cube([case_height,1,6]);
}
translate([0,case_width,0]) {
    cube([case_height,1,6]);
}
translate([-1,-1,0]) {
    cube([1,case_width+2,6]);
}
translate([case_height,-1,0]) {
    cube([1,case_width+2,6]);
}

$fn=70;