the goal is you cant sell a 3D printer without attestation that it is anti firearm compliant.
now they have to do 80% printers, kits composed of not a printer subunits, to be assembled on site.
then DIY sources must be dealt with:
https://pea3d.com/en/how-to-build-your-own-3d-printer/
it looks like mole whackings, all the way down.
80% kits are already illegal in California (as are 0% kits, if a solid rectangle of aluminum is marketed as being suitable for milling into a firearm)
I feel like kits for the purpose of assembling a printer would also be subject to regulation and attack... and open-source printer firmware... and related guides or resources... and related hardware platforms, like CNC and laser cutting...
Regulating actual guns that are frequently used in crime? Unlikely.
Regulating theoretical guns? No requirement is too draconian.