Best open source license for guitar?

PraxisGuitars writes: "I am working on developing an open source electric guitar. I wish to make the basic structural system completely open and free, with a standardized interface allowing different body shapes and modules to be bolted on. I am having trouble figuring out the best way to release the files. There seem to be at least half a dozen open source licenses out there; The Thingiverse has some precedent for open source 3d data, but version control seems like it might be difficult. I have looked into sourceforge and github, but don't know enough to know if that would be the best choice. Are there other precedents out there? Is there a better way?"