I think there should be an "experience" requirement for pre-1700 profiles, in addition to the self-certification process. Say, for example, 100-200 contributions. It would also be helpful to ensure that the profiles of those 100-200 contributions included quality sources added by the user seeking pre-1700 certification, but this would be harder to ascertain. I've seen many people join WikiTree, and then jump into pre-1700 within days, not really understanding what makes a good profile.