I have a 2018 RRS. I am adding a trailer hitch. I am thinking of installing an aftermarket hitch as opposed to OEM. Questions: 1. Curt says their wiring is plug and play under the rear bumper. Does the RRS need any programming to activate trailer mode or does simply hooking up a trailer activate that mode? 2. Has anyone installed an aftermarket hitch? The OEM fits snuggly under the rear bumper. Do aftermarket hitches fit the same way or do they stick out further than OEM? 3. Has anyone done a similar install and experienced any issues? In other words, is OEM worth the extra money?