Does the Place Stair tool among all the various constraints possible allow for user definition of the gap between two flights of stairs when creating a "half-turn" stair? so far as I can see the minimum separation of the flights is 250mm between closed stringers.
Let me look into this, I know we have a way to control the minimum distance between the two stair runs in a Half Turn configuration, but it may not be exposed or link making this unfortunate casual relationship. FYI - I'm sure you have discovered you can edit this distance after placement or using the HUD when you select the stair assembly.
Thanks,
Jeff Ashley