First of all- it was the 10 year guy's choice to move for lead. Second- why should his 10 years trump the other guy's 20 years? Why should someone be busting their ass as a mechanic for 35 years, and when they hurt their back move into a lead position- only to get shafted on his days off by a 5 year guy who's only been a lead for 3 years? I think that occupational (DOC) should be used for everything pertaining to the classification. Lead, inspector, lead inspector, tech crew chief, etc. I've always been opposed to premium seniority. There's a lot of different circumstances that can happen- and to me the argument of 'he's been doing the job longer' holds no water between people in the same classification. If they want to draw lines, then why don't they differentiate between aircraft and gse seniority?