I'm trying to figure out the right tool for the job. Take a 24" long log with bark and cut the four sides off leaving a square inside. I want to take each of the four sides flat side down and "scoop" out a flat area to do carvings on the "planed out" bark side bark side. Think of a planer but not the entire surface but leaving a bark "frame". This would need to be done on a small production scale. Thoughts?