Liked the idea of J-Max's drilling guide for the MFT workbench but wasn't sure about the accuracy of manual drilling. A plunge router with a 20mm bit seemed like it would be more accurate so I've modified one corner of J-Max's jig to accept a 30mm router collar and thickened the body to 10mm to accomodate the collar depth. It works very well with the locating plugs for the orginal jig. Make the fit hole at the front left of the board and work from there. The router may need some extra support to keep it square. Use the support block for this.