Part 2: Unanswered questions <br> This is the companion thread to How-to Manual Part 1: The answers; please see that thread for the general explanation of what we’re trying to do here. <br><br> This thread is intended to collect the how-to questions that people need to have answered. If you’ve searched through the companion thread and didn’t find an answer to your question, then post the question here. People who know the answer are then encouraged (!) to post a description of how to solve the problem in the companion thread, Part 1: The answers. And it would be useful to post a note here, too, to indicate that the question has been answered. <br><br> But as is the case with Part 1, in order for this to be useful, it MUST stay on topic—please do not dilute the thread with other kinds of comments. <br><br> If you have suggestions for how to make this work better or want to discuss the idea, I’ve started a third thread—How-to Manual Part 3: Suggestions for making the experiment work better.