I have made a router adapter based of the Rockler router adapter for SL/FX router lifts. It is designed to adapt for use with the Metabo M12VC router base. ID: 83.4 mm, OD: 90.0 mm (original OD: 88.9mm felt a bit lose in the lift so increased OD by 0.1mm). I would recommend rough sanding both complete ID and OD, fully, to improve grip/hold. A router is a machine that produces a lot of vibration so USE/PRINT AT YOUR OWN DISCRETION. Works well on my FX router lift and have only tested with M12VC router. Printed out of ASA on with standard ASA setting.