425, I don't know if you have any insight into this, it might just be one of those capricious nuances of what hits and doesn't, (and I'm not trying to get you to revise your rating) but it's curious how "Old Fuel" from the first round seemed to grow on you, whereas (though you didn't quite specify which of the two) I'm guessing "Mushroom Wall" soured a bit on successive listens. To me, though they're not identical songs, they both have similar purposes for the heavier riffing, where it's relatively simple and isn't really meant to be listened to in isolation, but just serves as a backdrop for all of the other elements in the song to hang off of. I'm just assuming the other elements worked better for you in round one than in two, but it's fascinating to me since you singled out the heavier elements this time, when to me they both serve similar functions in both songs.