Thanks for the quick reply! I'll check those posts out.
From what I've seen (which, again, isn't much), gears-level reasoning just involves comprehensively investigating a model. I'm sure I'm misunderstanding it, especially if it's now the basis for most of the posts around here. Could you enlighten me?
Hmm... I'm probably being thick, but it sounds like gears-based reasoning is just commitment to a detailed model. That wouldn't help you design the model, among other things.
I may need to investigate this on my own; I don't want to tangle you in a comment thread explaining something over and over again.