eps = 0.1;

module predni() {
  difference() {
    cube([59.5, 22.5, 1.6]);
    translate([18, 9, -eps])
      cylinder(d=3, h=2, $fn=50);
    translate([18, 14, -eps])
      cylinder(d=3, h=2, $fn=50);
    translate([48.5, 13.5, -eps])
      cylinder(d=7, h=2, $fn=50);
    translate([8.5, 10, 0])
      rotate([90, 0, 0])
        linear_extrude(height=4, scale=14/17)
          square(8, center=true);
    union() {
      translate([25, 6, -eps])
        cube([13, 3, 2]);
      translate([25, 7.5, -eps])
        cylinder(d=3, h=2, $fn=50);
      translate([38, 7.5, -eps])
        cylinder(d=3, h=2, $fn=50);
    }
  }
}

module zadni() {
  difference() {
    cube([59.5, 22.5, 1.6]);
    translate([5.5, 12, -eps])
      cylinder(d=5.5, h=2, $fn=50);
    translate([30, 12, -eps])
      cylinder(d=5.5, h=2, $fn=50);
    translate([17.75, 17, 0])
      rotate([90, 0, 0])
        linear_extrude(height=10, scale=15/18)
          square(20, center=true);
    translate([42.25, 5.75, -eps])
      cube([14.5, 13.5, 2]);
  }
}

predni();

translate([0, -25, 0])
  zadni();