Multiple blogs with one template set

I manage MT for a large company and we want all blogs to look mostly the same. I've used global template includes up to now, but would like to not have any code locally in a blog instance.

I am thinking of using all global template with just a single line include in a local blog to the global version of the template. Also looking at the Template Inheritance plugin from Mark Carey which accomplishes what we need. Link to file would have been good except it won't be recreated in cloning a blog, and can't specify the link in a custom template set.

Any other ways of having multiple blogs based off of one set of templates?