Yeah! Great demo Mr Egg.

My experience was very similar, and it saved me some work already. I created a system very much like your demo, and created the latest batch of flash cards for my wife. Then she tweaked the design... expecting a big sigh, instead she got "no problem", showed her how to apply the change to the template and instantly a a dozen pages of flash cards were updated. Fantastic!

I did mess one batch of flash cards up, for the various grades there is a different file for each. On the second or third file, I copied a page in, and then whenever I needed a new page I pasted in another page. The live copies were not linked. I found that after I copy a page with live copies on it, I need to copy that new page, before pasting in additional copies.

Very cool.
Thanks again Fin, Albacore, and Egg
Billy