We have a a FB2900 online and available to anyone to log in to and have a play.
You are welcome to make any changes you wish. The demo user is only able to temporally save the config using the 'TEST' button. This means that the changes will be reverted back after 5 minutes.
The default configuration has various features set up, some ping graphs, profiles etc.
If you manage to change the configuration where you end up locked out, wait 5 minutes and log back in.