I finally managed to use this bit on my panel of wood and was very impressed with the smoothness of the cut. I like that the blades can be replaced. I've just started this so I don't know how long it will take.
Pros
MULTI-PURPOSE WOODWORKING TOOL: This professional undercutter is not only ideal for leveling wooden boards, sanding or planing the surface of a mouldboard, but also for trimming and cutting grooves/grooves. Great Replacement Wood Carpenter Bit