For a real rough-in tool I use this wheel on an angle grinder. With a little practice you can take off pretty small amounts of wood but you really need a mask and eye protection. It's basically a chain saw after all. They are available in different size arbor holes, and with different numbers of teeth also.
http://www.amazon.com/King-Arthur-Tools-Lancelot-Woodcarving/dp/B00004RHL6/ref=sr_1_14?s=hi&ie=UTF8&qid=1443765478&sr=1-14&keywords=chainsaw+wheel
http://www.amazon.com/King-Arthur-Tools-Lancelot-Woodcarving/dp/B00004RHL6/ref=sr_1_14?s=hi&ie=UTF8&qid=1443765478&sr=1-14&keywords=chainsaw+wheel
