Every time I adjusted one as far as cables, I put the control in full down and tightened up the nuts on the cable to that and the middle notch was pretty much dead nuts on level as far as the diverter position and full up was just a hair off being all the way up

On my manual its either completely up when up and a bit room to still go down when down or the opposite. If you plan on pulling a skier or have issues with porpoise then make it adjust all the way down.