Just so that everyone knows, Shop Sabre sometimes adds a tangential knife to their machines. With the correct post processor, their knives can trace toolpaths similarly to a router. When they come to an angle that is too sharp, the head lifts, rotates the blade to the correct angle, reinserts, and continues on with the cut. Some of the tangential knives that they use even oscillate and can ~saw~ through somewhat harder or thicker material.
Microsystems World CNC (WinCNC)