Here's a link to my Flickr page that has images from my propagation process this year.
For someone new to Dahlias, I have to applaud your ambition! Your cuttings look great and your method so organized. I think you are hooked now. Evidently you have a green thumb too. Good luck on your new Dahlia beds.
I am still waiting for the ground to dry out a little so I can till again and get mine in the ground. They are getting too big for their pots...
Feeling more than a little proud yet somewhat embarrassed too, I should point out I took 522 cuttings, of which I lost 166 to rotting from the bottom of the cutting up to the soil line(??) That's 68% success.
Next year, fewer cuttings, 100% success...;-]