You REALLY don't want to ever make your CAD files publicly available... they are all you have that makes your product unique. Anybody can have tooling made, on six of the seven continents. Anybody can have parts molded. And once someone has your CAD files, they can do it with your design. The world, even this list, is filled with people who don't see a problem with making copies of someone's published work; don't see a problem with using another's plastic parts as masters for their copies; you won't have to go far to find someone who will "borrow" your design.
The law is pretty simple: 3d cad files of pre-existing real world objects are not protected by copyright because no creativity was used in producing the cad files. Lots of time sure, but no creativity.
