Wow....Hydraulics, sounds like you deal with vehicles? I find with any Profession, if we utilize our Tenure, Experienced Employees/Staff to assist with the Rationale of Why we do what we do and do it well, it helps the younger less experienced staff/employees understand that the trade/profession is an Art and that in order to preserve the Art we need to understand the mechanics of the trade. Then, once they have mastered the Trade and passed their Certification and Licensure they can then stretch and grow into their own way of mastering their piece of Art....