Yes, you need to question the candidate on how he demonstrated leadership and organizational skills to accomplish the project. His answers will determine whether or not he passes. Every boy must be treated individually, since every boys level of ability is so different. Having preset guidelines as to who does what percentage of the work is adding to requirements, which is strictly against national advancement procedure. If you keep following this procedure, and a scout decides to challenge it, you're going to get shot down very quickly by council, regional, or national.