translate([sonar_holder_length, 0, 0]){
cube([elbow_length, deck_depth, sonar_holder_depth]);
translate([elbow_length, 0, 0]){
translate([sonar_holder_length, 0, 0]){
cube([elbow_length, deck_depth, sonar_holder_depth]);
translate([elbow_length, 0, 0]){