Nimbostratus
Cirrostratus
You could take the /config/bigip_base.conf and the /config/bigip_sys.conf from one unit, edit it for the other units and then reload the configuration using 'b load'.
If you load a UCS from one unit to another unit with a different hostname, only the configuration that is shared between units in a redundant pair would be loaded. The /config/bigip.license file is not part of the shared configuration--so that wouldn't be a problem. However, this would not work well as the configuration probably wouldn't load successfully if the non-shared configuration wasn't set up prior to loading the UCS. ie, you couldn't load a bigip.conf with a floating self IP address which references a VLAN that hasn't already been defined in the /config/bigip_base.conf file.
Aaron