// allviews shortbase longbase slider all
view="shortbase";

ray=4-0.1;
ray_slider=4-0.4;
module base(len){
    width=14;
    height=12;
    difference(){
        cube([len,width,height]);
        union(){
            translate([0,width/2-1.5,height-3]) cube([100,3,4]);
            translate([0,width/2,height-2-ray])
                rotate([0,90,0]) cylinder(r=ray,h=len);
        }
    }
}
module slider(){
    cube([50,10,3]);
    translate([0,4,3]) cube([50,2,4]);
    translate([0,5,3+3+4]) rotate([0,90,0])
        cylinder(r=ray_slider,h=50);
}
if (view=="longbase"){
    base(100);
}else if (view == "shortbase"){
    base(10);
}else if (view =="slider"){
    slider();
}else{
    base(100);
    translate([0,40,0]) slider();
}