I’m impressed with the EFF. This doesn’t seem to be a natural cause for them because it involves 2A. Very cool that they aren’t so ideological that they forgo their principles (in this case).
They do a pretty good job of explaining it here
In 3-D Printing Case, “Code Is Speech” Faces New Challenges
https://www.eff.org/deeplinks/2015/12/3-d-printing-case-code-speech-faces-new-challenges