Jim (@w3asa), I think the tutorial @fisherba mentioned back in Aug. 2018 is this one: https://envirodiy.github.io/LearnEnviroDIY/
We last updated it in April 2019 with our v0.2 release: https://github.com/EnviroDIY/LearnEnviroDIY/releases
So it is written for ModularSensors v0.21.2.
Otherwise, it is “complete” (but there is always room for improvement).
I’ll probably be updating it in the next month or two. Keep an eye on the releases.