The stem of the word "complexity" - complex - combines the Latin roots com (meaning "together") and plex (meaning "woven").
Another issue to keep in mind when choosing a project is what becomes of your project once you have submitted your final report, passed your Eagle Board of Review, and moved on to other, exciting challenges in your life.
Also, be aware, that the Council or District Advancement Committee (as appropriate in your local council) is the final approval authority of the project idea, as well as the detail plan (before beginning the actual work), and the final report (after all work in complete).
If there is any doubt about your idea being a valid project, you or a troop leader should contact the Council or District Advancement Committee and get their buy-in before spending a lot of time planning a project they will not accept.
The simplest way to show this information is to include an updated version of the Materials / Supplies Table from the original plan, with all changes annotated (possibly in a Remarks column replacing the Source column).
The photos help the Eagle Board of Review members better understand your project and it will be easier for you to discuss the project if you can show them the actual work in progress and the final results.