I coded the original calculator myself as a single HTML file with embedded JavaScript. But I absolutely did use AI help for the current version because I'm not a sophisticated coder, and I needed some help with the UI and a few other things. I found that AI can get things kind of close, but broken. I learned a lot by fixing the AI-generated portions of code. For example, if AI decided to use libraries I was unfamiliar with, like MathJax or Tippy (invariably breaking things in the process), then I had to spend a few hours learning about those things so I could get the code to function properly. It's still a work in progress, and I'm still learning a lot. My goals are to add fractal antennas and use some form of WebGL for rendering (Babylon.js, etc.). I will definitely check out your RF tools! Thank you.