Units of measure should be part of every elevator pitch for F#. It's such a great feature. Love the live refactoring and seeing the application evolve as you gather more insights! I'm so thankful you are covering testing. Tomorrow I'll watch the video again, typing the actual code. One last point. You also mentioned property testing. I've heard people praising this technique, but it hasn't yet clicked for me. A brief intro later on would be fantastic!
excellent stuff. just now finished coding episode 2 of the frontend. learning a lot from you. I'm using the Sutil 1.0.0-alpha-006 release and there are some differences compared to yours.