I would like to create different variants of the same header template but it seems it doesn’t work for me.
I’ve tried exporting and then importing my base header template but the CSS classes of the new header template are the same as the original header template. Meaning, any change I do to a class of any of the templates it reflects on both.
Then I’ve tried saving the base header template & importing it through Bricks templates interface but the classes remain the same on the second template so any edits to one template still reflects on the other.
Is there a way of (e.g.) exporting a header template and importing it without the two being connected by having the class naming automatically changed (e.g. - .old-class to .old-class-imported)?
There is a similar post about this but no answers Re-using CSS class names when importing templates - why? and I believe Thomas has a post about changing the class names at import by adding, I believe, -imported, in the future.
Maybe @timmse can share some of his wisdom here? 
Thanks!