We have fairly complex scope previsions that limit contractors. Generally we only see "big" contractors during peak, and I can't remember seeing any in recent years. Some contractors flying larger craft in Europe when bilaterals limit Fedex flying, mainly flights to Britain but even these have mostly disappeared. Of course the small fleet is all contractors everywhere, even if the paint is purple. (Intra) Canadian flying is contracted. That's about the only time a Fedex painted jet is not flown by Fedex pilots.