Corner shelf wall mounted, big , 250mmx250mm

Corner shelf for wall mount, size 250mmx250mm. Best is to use a big printer, on the A1 or the P1S the corners of the print might lift the printbed up. I included a profile, but like mentioned before, it might lift the printbed up on the corners, so don´t blame me if you print the shelf on a P1A or A1.