I remember sitting in the classroom at Syerston being taught how to fill in the various sheets of the F700 by an RAF Techie who used this phrase "In the RAF we have a week to go through this, you will have an afternoon."
One of the jobs of a VGS Engineering Officer would be to train and authorise VGS staff to carry out those servicing actions permitted by their grade. Of course the Eng officer needed to be trained to do this themselves and tended to happen at Syerston on the 'VGS Conference weekend' ie Saturday afternoon or Sunday Morning.