A few quick notes on the exercises. I have gone over 200 words on this, Glen, but I think it might be a good goal to set myself in the future.
Vertigo
Ch12. It read well, flowing with good links. The only sentence I wondered about was the final example, which I felt stood a little bit more on its own.
Ch13. I thought the conjunctions worked well. However, I think this is a more difficult piece to jduge (if that's the right word). We're correcting another's work but, I suspect, coming up with variations on a theme when it comes to making it flow.
Springs
Ch12. It works as a concise overview of the politics in Northern Ireland and the sentences followed on from each other well.
Ch13. Again, very good linking of the sentences. I liked the conversational tone, for example in the midterm sentence, beginning it with 'now'.
Moonbat
Ch12. It flowed really well and I thought the rhetorical sentences at the end made for a good conlcusion to lead onto further study, were this a real sccenario.
Ch13. This too flowed well, improving on the original, but keeping its flavour.
Chocco
Ch12. It moved easily from sentence to sentence and I liked the structure. Perhaps, as you said, a little unwieldy in length, but I never lost my way, so maybe not.
On a personal note, I studied environmental economics. We might have to chat some day.
Glen
Ch12. I really liked how you opened the paragraph with pace and then kept it flowing from there. The only thing I would ask is did you write out a plan? I think this exercise works for me, partly as it demonstrates how we come at things in different ways, so I'd be interested to see how you planned it. But, that's just my own point of view.
Ch13. Breaking the tests into two types worked well.
A final note. As I said above, I like how this shows different methods to achieve the same goal. As to Springs and Glen, I thought you both had an easy conversational feel. I know my writing, fiction and reports (which have been my bread and butter), can be a little staid. I could do with emulating your conversational style sometimes, probably your pace as well, Glen.