I get on dangerous ground here as it's 38 years ago and I never had a formal course, at that time one was purely a radio engineer and with the comet in full time employment doing just that, however IIRC, red on the comet was just brakes and u/c uplocks. I think, if you had the remainder of your life, flaps. there might have been some flying controls as well as I don't recall much manual reversion.
I don't know if the nose on the caravelle is an urban myth or not but from brief encounters there were many similarities, Avons, 120vdc starters, coloured hydraulic systems etc.