Extracting Curves from Voronoi Pattern

Hi Users,

I am a beginner in rhino and grasshopper and encountered a problem. How can I edit my grasshopper code in order to get an output of just the Voronoi curves to later be used to project onto subd surfaces. When creating a multipipe I noticed that the output is not doesn’t create curves creating a weird intersection (see image attached). I could manually go over the pattern but it seems tedious, any quick ways to fix this? Any help is much appreciated! Also I was wondering, how I could possibly create a pattern that is more concentrated in certain areas and more sparse in others (facade design for daylighting optimization) still considering that I will work with it later on subd surfaces. Thank you.