I think I will get the Feat for Optical Enhancements, as it seems appropriate for a robot. However, I have a question about the benefit "Add 20 feet to any ranged weapon’s disadvantage distance." Does that mean I increase the total disadvantage range by 20? For example, an automatic pistol has range 50/150. With Optical Enhancements, that range becomes 50/170, not 70/150?