I completely agree that Dayton is a great location, particularly if it is in a location with easy access to both 75 and 71. A supercharger in the Dayton area would be perfect for travel to the Maumee charger along 75, as putting one any further south would put that leg out of reach of a 60, and any farther north would make the louisville/lexington legs to long for a 60 to comfortable handle. If the dayton charger is placed right, it would allow for a round trip between cincinnati and columbus in a 85, but it would probably be pushing it a little bit in a 60.
Cincinnati and Columbus will ultimately need their own chargers. Due to the spread out nature of the cities, and the virtual lack of L2 charging, they honestly will ultimately need 2 stations (in Cincinnati at least, a 4 bay station on the west side, and a second 4 bay station on the east side, would be much better than one centrally located 8 bay station). A west side of Cincinnati charger, either in Harrison, MiamiTown, or Dent, will be needed to the lafayette super charger in a 60. I know living in harrison I am partial to the place, but the new haven road exit off 74 would be perfect, since it has plenty of options for food and lodging, is the perfect distance to reach the lafayette charger, and would allow people making the round trip between cincy and indy to make a quick stop to assure that they can make the trip. From Harrison, the Dayton, Columbus, Louisville, and Lexington chargers are all well within reach. Harrison also benefits from the fact that there are not many local Tesla drivers, so the superchargers would not be heavily used by locals, and would remain available for road trippers.
