On a sidenote I think the Luftwaffe used a system in which 1-2 mechanics were assigned to a pilot rather then to his aircraft. (Aircrafts losses IIRC being higher then those of pilots). Only specialized tasks would be addressed by specialists at various levels of the organization. According to the various pilots the system worked well and the bonds between the pilots and 'their' groundcrew were usually very strong with all the resulting positive results...