I will not be changing my topic. I talked to Dr. N, who pointed out one very good reason (along with the obvious one about starting back at Square One), which is that this change would require changing from a design & development topic to a research topic.
I’m behind on the following: revisions on the literature review, project proposal, IRB. My three-day weekend is shortened a bit by some work and some travel, but I should be able to make some serious project on all three of these tonight. I’ll post the content as comments to this message.