Changing props - change flanges?

Not long had my defender but I want to clean it up and replace the suspension (it has a 2" lift and I want it standard). I've bought a new rear prop as there is a bit of play in the old one and will keep that as a spare and change the uj's.

Question is.. is it worth changing the flanges as well (cost aside)?

Only if they are worn

looking at the underneath, it looks like not much has been changed since it was new

Will take a look and clean them up if they're ok.

Cheers