smudge,
the G/Es certainly did lots of role changes usually alongside the ALM . I still have my certificate authorising me to do role changes and sign for them.
I am reminded that the frame change mentioned in my DG story also involved a role change at Bahrein. We had to txfer all the side guidance , roller conveyor etc to the new frame. The new lady loadie suffered in the heat so I parked her under the wing in the shade with my scarf soaked in water round her head. Did nothing for her hair but achieved the object. The G/E and I then did the role change. The lady in question was one of the first ab initio ALMs to come to the Herc. As for Izzie I was her boss on 30 and helped her with her prep for OASC commissioning board. My wife and I then attended her passing out parade at Cranwell. It rained cats and dogs but we had a very good party in the evening.