How about for a dry stout though? I've avoided s-04 because it has low attenuation. Can you get down to 1.010 gravity from a 1.042 wort with s-04 if you use a very low mash temperature?
Awesome! What mash temp did you use? And what was the ester flavor like? My favorite at the moment is london ale from white labs because of its estery goodness. I've used nottingham dry yeast, but it seems way too clean for british ales.
I think you love s04, if you ferment higher , you'll get esters. But it will attenuate pretty good. My only suggestion is why wash a dry yeast, I mean its cheap enough to just pitch another pack.