Well, the first machine you posted has the laser in the cabinet, its a fiber machine. Belt drive is pretty accurate, more accurate than the wood your cutting, and much easier to set up, and faster for sure. Any of the off the shelf lasers can be converted to Gcode, lots of hardware for that. My laser uses correl, and i can import DXF directly in, so never really been an issue for me.
Maybe a higher power blue laser would be better for this, no optics to really keep aligned.
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