I'm working on my workbench and it calls for wedged tenons for the legs and top trestles as well as the stretchers. I was doing a little reading about wedged tenons. Generally they call for the mortise to be undercut on the ends on onside to create a an angled mortise. This will allow the wedge to create a mechanical joint by flaring out the tenon to fill the mortise. My question is for hard maple I was thinking about making the undercut on the mortise about a 16th on both ends. Is that enough? This is my first attempt at wedged tenons.