Hi Dimitra! Thanks for your kind words! I'm glad you like our platform, it is not just me btw it's a team effort =) Rodrigo and I covered most of the topic of managing data structures in the 101 and 102 Grasshopper courses. Could you give me an example what it is you want to learn or what it is specifically you're missing or seeking? I could give you some better advise accordingly. Here is a good place to start: http://www.grasshopper3d.com/forum/categories/sample-and-example-files/listForCategory here people post sample and example files of projects they worked on. If you see like an interesting image, download the def and learn from it. That's how I learned most of what Ï know. Cheers and good luck! Arie