I wish I could leave something for future applicants: don't simply believe their claim that they are weighing mostly on your portfolio. You may still get filtered by your undergrad institution, GPA, recommendation letters, and get zero portfolio visits throughout the game. Since you have no way to report your GRE, this time you have no way to compensate for your academic background. It may also be better if you have a chance to visit the lab in person and build some connections - without connections, it seems much harder to get in, or even simply get a glance at your folder.