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I started with the rabbit because that's how I have the print-outs ordered. This first scan is my first and second attempts, the drawing on top has notes that I made before I checked it against Preston's originals on the computer. Which admittedly was a terrible mistake.
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So I checked both copies lining them up as best I could and found out that I was totally wrong about the fists, but was right that I had the body too long. I marked my corrections and attempted to construct the rabbit once more.
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This seemed a lot closer, and indeed was, but I feel that it somehow degenerated but couldn't place my finger on it.
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Rescanned and checked in photoshop, sure enough the legs are more out of tune than ever and the head is still to small, but now I know where I'm weakest, judging horizontal proportions and placing things that I can't easily map out.
Any suggestions or techniques on how to map these out more logically would be greatly appreciated.