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Ich weiß, es gräbt den Beitrag ein bisschen aus, aber wenn es um Laser-3D-Drucker geht, haben sie sehr schöne, kleine, mit Aluminium-Gehäuse Optlaser, z. B. für Prusa
https://optlasersgrav.com/cnc-laser-upgrade-kits/prusa-laser-upgrade-kit-with-plh3d-2w