Setting in continues with the more curved parts of the letters. You'll notice that what has looked like a mess suddenly starts to clear up!
I haven't been putting on the screen each and every tool I that use as I normally do. Exactly what gouge profiles you need will depend on what alphabet you use, so it's more the method here that you want to grasp. In the download I've put the tools that worked for my letters in this project - all pretty common gouges.