I had a hard time removing removing SANWA-OBSF-30 without damaging the tabs by hand. So I modeled this tool to assist in extraction. Consists of a cylinder to press the tabs inward and a plunger to push the button out

Should also work for OBSC-30, or OBSJ-30. I haven't tested it with other brands but it's likely to work if they're 30mm

These parts are very tightly toleranced and the plunger may need to be adjusted depending on your printer. This can be done after the fact with sanding, too.