Should I compile a checklist?
It's vital to compile a checklist, because it gives you a focus on what you're doing. Working from the know to the unknown. That's why it's so important to have your sketch family tree to start you off. You can see where the gaps are. Make a list of the gaps and then list the sort of sources that you think might provide the answers to those queries. Then work through it. You may find as you go along that some will be crossed off, some might be lifted higher up on the list or you might have new ones. So it's a living being but a checklist is absolutely essential.