Thank you Sir for your appreciations!
1. I've seen your contributions at Staircase generator.
2. Some of your suggestions are valuable and I will think about them for the likely version 1.1:
2.1. Different shapes sections for balusters.
2.2. Panels between balusters.
3. All of this will imply changes in UI and I don't know yet how it work this beta4 especially under MacOS.