In Sep 73 I climbed into XR 362 at Goose Bay for a ride back to Marham. ...got a balcony seat and had a very comfy ride. 20 years later I got aboard G HLFT at Gdansk for a ride to Stansted. .....made straight for the balcony -GONE!. I guess it was removed along with the refuelling probe to reduce weight. Pity, but all was not lost - we went up on the flight deck and bothered the flight engineer (there was no nav)
I remember the engineer spent a lot of time trying to bring one of the engines into 'synchronisation' - something to do with 'elimination' of an unwelcome resonance. I never quite understood what it was all about - can any take a guess?