It's all good, man. I was a bit disappointed not to get a prize, but you don't owe me a thing and it's not owed to me by "the universe" either. I just do the best I can and if it works out, great. If not, then I still got to talk with some cool people.
Don't stress too much about getting the formula right. It's hard to quantify it through finite data points that only measure specific things. I think you're doing a great job! Thanks for taking the time to run it. :)