I don’t think the cantilever will be a problem with its size. It will help with loading for sure. I also was concerned about 3D printed parts. But. The only thing the 3D parts are doing is mounting ldler wheels for travel. The square ng is taking the load.Is the purpose of the cantilevered gantry to let you slip larger sheets on the table?
I would be concerned about the cutting torch bouncing and shaking with that design. My understanding is the floating gantry arm is supported be 3D printed plastic guide brackets? Hmmm....????
A conventional gantry secured on both sides would make me feel more comfortable.
I also think the gantry can be lighten by moving that axis motor. His design has it on the z axis mount. Where I think you can relocate the motor to the double 2” tubing. Keep the motors stationary.
I’m gonna start collecting materials and do alittle more research.