L1A1 zeroing adjustment, iron sights and SUIT sight?

[frostie]

There seems to be a lot of different answers to zeroing the L1A1.
When I left the army in 1973 from what I remember the zeroing was done with the iron sights set at 200 yds. At 25 yds the MPI was 1" below the POA. At 100 yds the MPI was 4" above the POA making it spot on at 200 yds.
At 25 yds one full turn of the adjusting screw altered the MPI by 1". At 100 yds it altered it by 4".
The magic mantra was "Foresight into the error--Back-sight out of the error"
I just hope my memory is not playing tricks on me