Dale, sounds a most interesting gizmo. Presuming your router is offset say an inch and a half or something from the gauge, would not the curves radius have to be changed to be shallower on inside curves and sharper on outside curves so as to get the correct cut?
this could of course be done by making a properly sized marker block to follow the curve as the tool would do. Hmmm, Maybe I'm wrong. Let us know how it works out, Also, how sharp a radius can you make with it? Thanks Tom Fowle