Flipflop,
I'm familiar with frame 29 etc, ( don't play with systems in certain conditions as breaking '29 is unpopular ) and trained first as a fitter; the II+ is very markedly stronger than a GR9, reinforced particularly for aft fuselage acoustic vibration; I've walked on the things while being built and photographed every inch; I was not a
PR photographer, more an assistant to fitters and designers.
I've also been to many an engine run on GR5's and FRS1-2's, I agree it's like seeing an angry T-Rex chained down !
With a proper refit and TLC applied, there's no reason why the aircraft should appear tired, and I'd be surprised if the airframe gets anywhere near life cycles, it's the engine one has to refurbish, which is taken care of by EUMS.
Doc boy, I completely agree !