Hi Wayne.
Nice article, thank you.
Can you explain what you mean by: "...you can specify what the server is change all the variables at one place simply" please - it reads a little strangely to me.
Another thing of interest - is there a way of using SQLCMD mode to run a command on one server, capture the result in a variable and use that result in subsequent commands against other servers, within a single script?
If you haven't even tried to resolve your issue, please don't expect the hard-working volunteers here to waste their time providing links to answers which you could easily have found yourself.