I saw the other design here on Thingiverse and remembered I had a very detailed 3d model of a Mad Cat on my computer. I rebuilt the top and arms from scratch (since the model was not very manifold), but used the legs from the model as I got lazy. So the legs are a tough print.

UPDATE: For reference, this model inspired me to make this (Though this isn't a proper derivative as I made the model from scratch): http://www.thingiverse.com/thing:7286

UPDATE #2: Uploaded a manifold version of the legs. Still makes Skeinforge complain a bit, but gets sliced much better. I also made a plate with all the parts on it for easier printing (probably too big for a Makerbot, but you can always print the pieces individually).

1. Print parts.
2. Glue together.
3. Enjoy!

UPDATE: Note that you'll need support for the legs. I just turned on support in Skeinforge with fairly normal settings and it worked. I did have to work a bit to clean em up though.