Regarding the Excel file, you all are certainly welcome to use it! I’ve also integrated the rules and charts into electronic versions of the original 2nd edition rulebooks but I’ve not posted those because I’m not sure if that’s OK/legal to do outside of my own private use. :? If it is OK, I’d be happy to post those as well.
I’m pretty sure it’s illegal, but OK. I mean that it’s illegal in the sense that writing Transformers fanfiction is illegal: It probably violates a copyright law, but Hasbro is never going to do anything to you because you aren’t making money off of it and they won’t waste the time and effort to sue you.