Requesting the ability to mirror construction geometry to achieve the same angle and distance from a given object when adding features to an existing model. For example, I am redesigning a piece from our design for production, due to constraints on a battery module, there needed to be an angled door with a rail system to slide this battery pack into place, while also having the consumer able to remove the battery pack for charging purposes. I want to mirror the plane I had created earlier in the design used to create this door to the opposing side of the design in order to create a panel for an LED control module while still maintaining a primarily symmetric design. I can still achieve this, however, there are many more steps I need to go through due to the lack of this feature. Thank you for your consideration and I hope this information is useful in the improvement of this amazing program! Big fan of Fusion360!