This was a fun and successful experiment! The seed was Redskin mix, started in April, and this is the first of my plants to flower. It's a nicer color in person than the camera captured. :)
Well, when those bloom out, do post pictures of them. And there is nothing to keep you from saving seeds from any dahlia specimens that you have. I have enjoyed breeding zinnias, and that can be as simple as saving seeds from my favorite zinnias. Of course, I "be the bee" and do some cross-pollinating on my own. I do get some zinnias that you can't get commercially.
That specimen had some pollen that was just "begging" to be used to pollinate another zinnia.