I'd say left limb looks to be bending a bit much at the tip, right looks a tad stiff.
If you do the CD test (Hold up a CD (other round objects are also available
) in front of the pic) it shows the potential hinge near the left tip.
BTW I work in inches for length and mm for width thickness. I think cm are the spawn of the devil and not an engineering unit.
Yeah 80" does seem a tad long, but taking off 6" seems a bit drastic, I'd have thought loose 4" then there is still a little wriggle room.
That's still on a long string isn't it? If so, get it braced immediately else you will be in danger of coming in underweight.
Del
(BTW the above is all just my opinion and you are welcome to take it or leave it, but please don't tell me I'm wrong, I got thoroughy sick of that on another thread
)