3d printed nut for 3 string cigar box guitar

cbg_nut.scad

$fa=.05;
$fs=.05;

difference() {
    nut_base();
    translate([0,0,1]) slots();
}

module slots() {
       translate([10,0,3.9]) rotate ([90,0,0]) cylinder(20,.6,.6,true);
       translate([0,0,4]) rotate ([90,0,0]) cylinder(20,0.7,0.7,true);
       translate([-10,0,4.2]) rotate ([90,0,0]) cylinder(20,.9,.9,true);
}


module nut_base() {
    union() {
        translate([0,0,-1]) cube([38,6,6], true);
        translate([0,-1.4,2]) cube([38,3.2,6], true);
        translate([0,0,2]) rotate ([0,90,0]) cylinder (38,3,3, true);
        //translate([0,0,-7]) cube([41,11,9], true);
    }
    
}