Ah, that's better, although a bit difficult to see at this small size (check it out on the big image later).  

But why have I got little wiggles and how did I decide where to place them?

When you curve, a steep line will give more contrast (in that area), but you will have to have a shallower area to compensate - so it is a balancing act, trading off one range of tones for another.

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