We ran into a problem creating multiple reverse ssh tunnels. Our ~/.ssh/config file specifies a default reverse tunnel. When we use Core Tunnel this .ssh/config tunnel is also establish, causing subsequent other Core Core Tunnel tunnel creations to fail as we cannot bind the port mentioned in .ssh/config twice.
It would be nice to have the -F option available in Core Tunnel so we could skip the .ssh/config via -F /dev/null.
, you will see it in next beta 