[FatBoy]

I’ve just realised what you meant and we’re talking specifically about the upper rears. From memory, I didn’t have that issue, because the outer ends had to be screwed right in and the inner ends were close to fully in.
If you find that when everything is properly setup, you have markedly different amounts of thread showing at both ends, you could adjust them by an equal number of turns to even them up. But re-check your measurements again afterwards.