To improve the finish cuts, what I have done is to increase the resolution (stepover). MeshCam Art has an option to use Adaptive Stepover, which does result in a better finish cut. However, it also results in an increase in cutting time. I just finished a piece, which is Old Glory flapping in the breeze. The total cut time for that piece was almost 18 hours. But it did turn it pretty nice. I will post a picture later.