I've had a bit of a play with the cookbook source. Took a copy (using view source in browser) and saved to local file. Almost worked straight off, but a couple of source files are referenced without full URLs. Once I fixed those, it runs fine, and I have been able to make a few modifications for my own purposes.
Next up I think I will get all of the rockpool and cookbook files local and start learning by breaking.
BTW, I think there is a bug in the weather section of modules.js: "if (temp>temp)" should read (if temp>highest). Also, strictly speaking you need a "lowest" check - particularly if used outside at the moment.
Anybody any thoughts on how the barometer semi-circle display is meant to work in the weather station cookbook?