TC can't do that as far as i know
Also TC don't draw the stair stringer ??
In Norway we have the same system, uniform scale along the "walkingline" that is 3 or 400 mm in from the side, don't remember rigth now..
So a workaround in TC is to make 1 3D and 1 2D on different layer's to switch between, depending on your print.
We don't need to draw 100% correct stair, we sort of just indicate what kind of stair and then the law say what's the minimum standard that it should be build after.
The manufacter take care of it if they want it 100% correct, they have special Cad programs for that.
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