Steve,
That is indeed a solution. Problem with this solution (copy the master db to customer) is that we need to install the db compare/synchronize tool at the customer. This is hard to maintain and what about licences...
It would be esier to make a data model snapshot at the customer, copy this to our server, compare and make a synchronization script, copy script to client, execute script...
As you see not a very nice solution if you have a lot customers and a few updates a year...
Jan