I'm not sure how many people here have tried this file yet but it should be on the list in my humble opinion.
Space Station 3-D Printer Builds Ratchet Wrench To Complete First Phas | NASA (http://www.nasa.gov/mission_pages/station/research/news/3Dratchet_wrench/)
Barnacules Nerdgasm had a go at it....
https://youtu.be/mvr9a4aZlmU
And I even had a go on my Anet A8
(https://lh3.googleusercontent.com/2MfzJVOepWYLfEfJ4THbEx5NSEuGTBq_n5wmi3KPJR8L9vOvtXkAvUDJfPNcvJvaE4seeZr3bwjRB1oJqBdGG-DwoToaklWuA-6MGsAM_wptrxV47L8jyNJZ8AC-pQEDbgXvtzyl5s2KMs_9ILZsWcdNLY3husQbSsSUx0U1_Cv3UQlCy1qG9W_dwNdA853Di4y279QKw5ecbSKIF1TuEZp4cYZG9yO4jmN01U0WvbO7Z9JF_oy32GW_WkgE37aG2d5zC_ApujrS06a89pEwY1ZAX_ZeOfm3kouxHXRaWu7CULWoEAOhDeASO557Qlz4YaBVjM3jlbDXsVPuLZiIwjfDIiBSIu4zzahKjT5y5MrEc6udDuC-yv4AepLrEBHpsSm7f5jBPb-_s-o_sdqLFQhkZ1SFZ3YBLIJFGJC3VqjMVerVFt2kL4WcbDFlscbV5TPRWyc6IqmI7_1RZ4c0EB-XVMkPPeX9gpNZbBXhcmdZZjHc4TuHOjbZcUoFkKSfypCxgswRabqFSaP5WDR7OwVD0vuK4tZoL2fAnOv36LxrHt04f7n7OSc_0Aagviqd5gHAmjy-hdv2on8w94zMnYqR5uBSGuACiiIFkdM0=w359-h637-no)
The file is here. Wrench | 3D Resources (http://nasa3d.arc.nasa.gov/detail/wrench-mis)