On the theme - if I don't have newer versions is that an issue - or more just the fact that I can go back to a standard theme and then in meantime (after the fact) kind of refresh a current theme (I presume the theme is almost a moot point given the fact that the changes from 4.3 up to 4.7 are so drastic or am I mistaken there).
Additionally - any context in terms of the time it might take to go through the various gyrations (I get it - it depends). The good news I don't believe I have any custom plugins/applications - it is a pretty standard forum install with really the only customization the theme we have (including the various avatrs and images used within the theme/skin).
Sorry - one other question - is easiest way to test if the instances can handle to just do a fresh install of the forum software on my server. Basically if that works - than the server is set up with the right php, etc and than its really just a matter of making sure I actually do the upgrade right (or at least at that point - I will have narrowed down the issue, if one would arise, would be entirely driven by how I implemented the upgrade).
