User blog comment:Willbachbakal/Singleplayer Plasmids/@comment-109.153.74.225-20110121144510/@comment-1330314-20110208072351

You know, having an idea for an upgrade tree isn't exactly that unique in itself, so you don't even have to acknowledge me when you post your ideas. Thanks for asking, though, and feel free to add upgrade trees to your Plasmid suggestion.