That's an excellent idea. I like that you can do it sitting comfortably at your kitchen table, rather than bent over a
garden bed. Thanks for all of the great photos you provided. I am sure your methods result it much more uniform germination than mine as well.
Thinning large beds of carrots definitely is time-consuming, as I learned this year. I have goats and bunnies though, who love the thinnings, so I will most likely just continue over-seeding and giving the thinnings to the critters.