Is it possible? Yes. And you’ve mentioned stability could be an issue. I’ll add that if you count your time and wasted plastics to test the thickness, infill, etc. I think it’ll cost more than just buying the extrusion.
That said, if you already have core xy printer, you can start testing by replacing the frame with a printed parts. Starts with the vertical ones.
Is it possible? Yes. And you’ve mentioned stability could be an issue. I’ll add that if you count your time and wasted plastics to test the thickness, infill, etc. I think it’ll cost more than just buying the extrusion.
That said, if you already have core xy printer, you can start testing by replacing the frame with a printed parts. Starts with the vertical ones.