Hi,

I am currently trying to make a 2 wheels creature, but I feel like the muscles cannot expand or contract enough to actually be able to make a complete revolution of the wheel. I tried to put the connexion of the muscles as far as possible from the wheel but without success. Here's a picture of that creature: 

https://imgur.com/ocrFDy3

Here's another version I created. The muscles do pass the 1/2 turn but the creature don't seem to understand when to expand the muscles.

https://imgur.com/Rg6AN3u