Someone asked “how much slack to leave in rohloff cables”.
Well, that is the great thing, the gear cables don’t need fine tuned tension to work, once correctly setup they are set until you need a new cable or gear ring cable whichever comes first (normally the latter).
Mine are loose but only a fraction of a turn on the shifter will take that slack up. You have to be sensible about it, too tight and those bayonet connectors are not going to couple easily, too loose and you’ll be waggling into your spokes and of course will not be able to change into all 525% / 14 evenly spaced gears.
The nice thing is the barrel adjusters can take up the excess slack if you have a bit too much.
Have you seen Shimano’s effort even on their latest Alfine? Yuck! No better than my awful Nexus.