Conversion plate for Pro Router table / Saw table, sold under many names Cotech, Craftsmen, GMC Router table etc for a 65mm router lift with 5mm holes in the corners of 70x62mm. The plastic ring is 104 mm / (4 inch 1/16) in diameter. Check that the holes in the printed ring match the router lift screwholes.
Remove the metal plate from the base. Replace the plastic ring with the printed one by aligning the tabs. Drill 5mm holes with a metal drill where the recessed holes are, using the printed ring as template.
Attach the router lift under the metal plate, observing where the lift screw is positioned and place everything back on the base.

Router lift picture property of Changchun Highpoint Technology Co., Ltd.
Roter table picture property of Clas Ohlsson AB.