Hello new to rc I bought a arrma outcast 4s and 6s.. I bought the 4s brand new 2 weeks ago .. and the 6s 3 days ago for 100 bucks off market place still runs ! I just don’t know what version it is can some one help please and is it worth upgrading ? I really just wanted it to have all the outcast 4s 6s and 8s but would like to bash it as well