I tried a shedding blade on Meg once, and she was completely appalled. I don't think Gusto has enough hair that it would work for him anyway, but I'm not sure he'd be any more pleased by the feel.
I don't curry the dogs with the curry the way I would a horse; just short, fast, deep swipes in the direction of the hair. Both dogs lean into it happily, and it gets that tiny bit of downy undercoat that Meg has out nicely.