raild = 64.9;
railh = 18.5;
clipt = 7;
clipt = 3;

module rail_latch(x, y, z, m) { 
    difference() {
        cube([x,y,z], center=true);
        translate([0*-m,0,10-z]) rotate([0,25*-m,0]) cube([x+1,y+1,z], center=true);
        //translate([5*-m,0,30.8-z]) rotate([0,5*-m,0]) cube([x+1,y+1,10], center=true);
        //translate([5*-m,0,30.8-z]) rotate([0,25*-m,0]) cube([x+1,y+1,10], center=true);
        
    }
    
}
module rail_clip() {
    //cube([raild, clipt, railh], center=true);
    union() {
        translate([raild/2+2,0,-5]) rotate([0,5,0]) rail_latch(5,clipt,30,1);
        translate([-raild/2-2,0,-5]) rotate([0,-5,0]) rail_latch(5,clipt,30,-1);
        translate([0,0,railh/2+3.5]) cube([76.5,clipt,7], center=true);
        
    }
};

module hook() {
  union() {
      translate([0,0,3.251]) cube([3,3,6.502], center=true);
      //translate([0,0,6.5+1.5]) cube([3,3,3], center=true);
      //translate([5,0,6.5+1.5]) rotate([0,90,0]) rotate([0,0,45]) cylinder(h=7,d1=4.2, d2=1, center=true, $fn=4);
      translate([2.5,0,6.5+1.5]) cube([8,3,3], center=true);
  }  
}

module hooked_rail_clip() {
    union() {
        translate([-38,1,10]) rotate([0,-90,0]) hook();
        translate([0,1,0]) rail_clip();        
    }
}

hooked_rail_clip();