I need to cut a groove approx 15 mm wide in the 35 mm wide edge of a door 77 cm wide. An inexpensive router seems the obvious tool but would it be possible to achieve the necessary stability on such a narrow (and comparatively lengthy) work surface? Alternatively, do routers come with guides which keep the router stable by engaging with the front of the door? Given the akward length of the door (197 cm) the perfect guide would be one which allows the routing to be done with the door laid flat. BelmontR