Mmmm interesting, you went from this.
To this after a basic setting
To this
From adjusting the vertical screw 1/4 turn the value in measuring block 2 reduced significantly whereas the value in block 11 has returned to about where it was before.
So I will wait with anticipation to see what you get on your return journey after you tweak the horizontal screw.
I got quite a jump in my figures from the last set of readings but its still working????