Thanks for the reply. I actually ended up just trying to use 2.3.1 in my application, which also forced me to take a small upgrade in rails, but it wasnt a major update.
However, while that is all working, im now getting permissions errors during my capistrano build process and im generally confused about how the permission scheme around gems etc works. I also dont get where the rubyconsole script fits in.
I wasnt able to install ruby versions with rvm as normal use due to what seemed permissions.
I wasnt able to instlall some gems (mysql2) for various reasons, but im assuming that was a ruby 2.0 vs 2.3.1.
Now, i can bundle install on the server properly but capistrano cannot, due to permissions errors.
Is all this mess something you can help with?