I was thinking about making a tech tree like this myself, so I was wondering if I could help out some? Note: I don't have any modding experience for KSP, however I do have some experience modding. I do not know any programming languages, but I do plan on learning C++. LISP, JAVA, and Lua (minor experience in Python and Java but I don't remember anything). I don't have any trouble when learning programming languages as long as I learn the Syntax first and the actual "words" later. I was thinking of doing something similar so that you started out with Kerosene and a basic oxidizer for propellants and gradually made your way up. My idea was for decisions. Do I go after more advanced fuel types now, or do I upgrade my basics first? Should I continue using current materials, or invest in costly advanced materials that will save me time and money down the road? And such. Having to decide between making your rockets more powerful or more efficient is the basic premise. So, in other words I would like to work with you, especially since I made this account specifically to ask you these things. If you think I need more experience first, I understand, and am willing to focus on smaller mods to prove myself to you first. Thank you for your time, Jay2Jay