does anyone know if the valco baby rover rider stroller board is compatible with the uppababy vista stroller? We LOVE our stroller and would prefer to not buy a wagon if we can help it. Sometimes our 4 year old gets tired, so I wanted a seat option for her if needed! I will have a 2.5 year old in the bottom seat and a car seat w/adapter in the top. Also, if you do t own an uppababy vista, it’s amazinggggg!! It pushes it self it feels like. I can walk, run, go up and down hills with ease with both of mine in it currently. Don’t know who needs to hear that!