Stairs Railings Sweep problem

Hi All,
I try to build a continuous H-beam curved railings.
so I tried Sweep1 Sweep2 and Flow, It worked but it was not perfect because it had wrinkles.
Now I cant fix the wrinkle problem.
Does anybody have some better way or another solution to this ?

STAIR_Railing.gh (39.0 KB)

what do you mean with “wrinkles” ? :slight_smile:

these are your rail curves:

the sweep looks pretty ok, considering the input curves:

Hi inno

As you zoom in , you’ll see the wrinkle on the turn of railings.

I think I found the problem , which is the curve got a little twisted after Flow output

Maybe I need open a new topic to figure out the Flow problem.

Thank you