+ translate([between_sensor_centers / 2 - between_sensor_centers_variance,
+ 0,
+ 0]){
+ cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);
+ translate([0, -sonar_sensor_radius, 0]){
+ cube([between_sensor_centers_variance,
+ sonar_sensor_radius * 2,
+ sonar_sensor_height]);}}