I've always seen it like this... The riffs and arrangement of the song is the foundation of the song. Other things are written to make it a complete song. Drums, bass lines, lyrics and vocal patterns, leads, overdubs, keys... To say this is "the last 5% of effort" can be misinterpreted and somewhat insulting to all the other work that went into making it the song it is when complete. The riffs only make up a part of a song. There's been many times we're not sure about a song until all the layers are on top, and then it finally becomes something special, and we've done that since day one. There's never been a single song, since day one, that is 100% a one person effort, other then perhaps the interludes, piano pieces, or single acoustic guitar tracks. Take Silent Tomorrow for example. That song is TOTALLY different then what was presented to us. Eric wasn't happy about the changes to it, and perhaps that's why it's not a favorite of his, and I can appreciate that being far from his vision, but that turned out to be a fan favorite, and we still play it live today. Bottom line, we always made it work, no matter what the process was, and the end results have been more then pleasing to us.