(...) Meanwhile I explored a little of the heart anatomy

• In your model, the right Coronary artery arises from the anterior aortic sinus and the left Coronary from the left posterior aortic sinus

• The left mains stem lies between the left auricle and pulomonary trunk

• In Your model it looks like left main lies drilling through the left auricle

• The right coronary should arise from the anterior aortic sinus (Location of mouse pointer)