Challenge 31 is Seiji Nishikawa’s 15°-Based Cat. I’m not sure how you name models by degrees, but I can see the tail and out from the center to the head both have 15° subdivisions.

The head of my sitting, blue cat is more like the original model. However, he should be standing like the green one.

I like the cat, but he’s more of a puzzle than grandiose. So here are a couple of models from Works of Seiji Nishikawa: his Tiger and Wagtail.

The tiger keeps flattening out, so I tied a rope around him. A wagtail is a little bird.