I'm working through the Evil Genius book and really like it. But I have some questions about it. I'm trying to set up the circuit for the Tune Maker (Project 19), but I'm unclear on a couple of things. I went to the website and was delighted to see the Project photos, but I believe that the one for the Tune Maker is incorrect and is, in fact, the same one as the Light Harp (Project 20). It has 2 light sensors that aren't in the Tune Maker and it doesn't look anything like the photo in the book.