@Andy Broomell Hi, and thanks for offering your advice.
Not that I recall. If I've already inserted a title block for some reason, and want to swap it out for my custom block, it doesn't like that. I get a popup message, which doesn't let me replace it. However, on a new document I don't get any of those troubles - other than the annoying revision being letters rather than numbers.
I appreciate that I can just edit it that on each page, but I wanted to create a title block that would auto insert all of this for me.
many thanks,
Rob