I've not made any additions. Haven't felt the need. I don't feel like my front end wanders, but then, I am not a high speed driver. Try to stay at 60mph. I know some owners don't like the tankless water heater but I believe they are mostly boondockers. We are full hook up people and love our long showers and the tankless.
Me, Mrs., and Maggie
2015 Precept 31 UL
2015 Equinox, Blue Ox Avanta LX