I'm in the process of setting up Composr on afansite.net (currently closed while being develop)
I like the sub communities feature and would like move the different fansites I run under 1 install.
I tried it with OCportal but ran into issues or maybe the web host I was using at that time didn't have the servers setup right to run OCportal w/ sub communities.

Update: Afansite.net is online and I've setup the sub communities for all my fansites.
For a list of the fansites: https://afansite.net/directory/start.htm

Starting the process of moving the content of the fansites from the old sites to afansite.net.  It appears that Composr doesn't have a importer for the oxwall.com platform.   So moving the content will have to be done by hand.