Matching Receiver and Base Plate Height Using Drop Receiver

For our coach-mounted tow bar, Roadmaster says 3-inches either way. Different brand, but a tow bar is still a tow bar. I'd imagine BOx has a spec as well. Unless you're in a real hurry and don't have time to order the 6" drop in, I'd say at least get it all connected and see how it rides with the 8". We;re going to be facing that when I get our Corolla set up. Problem I see is that the drop will snag on the road backing out from our parking area. I'd hate to have a motor-home-mounted bar that I still have to take off.