(Image credit: Future) Noctua has released 3D CAD models of many of its fan designs, which is good news if you're 3D printing a project that plans to make use of them. You won't be able to print a straight-up clone, though, as the company has deliberately modified some of the crucial details, like the fan impeller geometries. Noctua says the CAD models are provided on an "as is" and "as available" basis, with no warranties or guarantees, and that the models have been released "solely for reference, visualisation, and integration purposes." Noctua also says the 3D models may not be used for "the manufacture, reproduction, or commercialisation of the products they represent," and this seems to be the crux of the matter. While hobbyists might do well to learn from everything Noctua does in its fan design, competing companies would likely look at a fully-accurate file with great interest.…