there is another way of achieving an adze-cut look on a timber that I have used and found to work very well. Take a Makita 1900b curved base power planer and regrind the blades into a convex curve. Then, you run the planer along the surface of the beam rhythmically bobbing the cutter up and down - adjusting your rate of 'feed', and the duration that the blade is dropped can give finishes that vary in appearance from small scallops that look like gouge work, to broader chops that look just like the dub from an adze.
