$fn = 50;
height = 50;

durchmesser = 42;
thickness = 10;


use </home/bazzite/src/OpenSCAD-Modules/roundedSquare.scad>


difference() {
    group(){
         translate([-26,-45,height]) rotate([0, 90, 0]) roundedBox(
            length = height,
            width = 90,
            height = 3,
            corner_rd = 10,
            corner_ld = 10,
            corner_ru = 10,
            corner_lu = 10
        );
        ch = height;
        cl = 26;
        cl2 = 3;
        translate([-cl/2,0,ch/2]) cube([cl,50,ch], center = true);
        cylinder(height, (durchmesser+thickness)/2, (durchmesser+thickness)/2);  
    }
    cylinder(height, durchmesser/2, durchmesser/2);
    translate([30,0,height/2]) cube([50,30,height], center = true);
    
    translate([-30,35,10]) rotate([0, 90, 0]) cylinder(r = 3/2, h = 10);
    translate([-30,35,40]) rotate([0, 90, 0]) cylinder(r = 3/2, h = 10);
    translate([-30,-35,10]) rotate([0, 90, 0]) cylinder(r = 3/2, h = 10);
    translate([-30,-35,40]) rotate([0, 90, 0]) cylinder(r = 3/2, h = 10);
}