MacTennis

After 2 years, just a quick note of thanks for sharing since I had a similar issue. I drew an object and removed nodes on the right half because I liked the left half better. (I removed one half to get the inner nodes closer together.) Duplicated the object and Flipped Horizontal. Brought the two together and drew a rectangle in the middle then selected all 3 layers and used Layer > Geometry > Add. This might make help those needing symmetrical wine bottles, beer bottles or glasses. Perfect!