It is important to note here that the CNC machine is ONLY used for the bulk removal of excess wood. The final finishing work is all done by Christopher Dungey’s own two hands (see Hand Finishing below).  Now for the tech talk: In the first image (a) below we see a 2½ Axis Profile roughing operation using a 12.5 diameter Ball Mill with the XY Stock allowance set to 3.0 mm and Cut Direction set to Conventional (Up Cut). The Z depth of this profiling operation leaves a 7.0 mm thickness at the base of the stock and two rectangular bridges (20 long x 7 high) at the north and south locations. Refer to the Rough Finishing section below to see the Bridges & Tabs clearly.  The next two operations shown in images (b) and (c) are an interesting use of 3 Axis Parallel Finishing, but used as roughing, again with a 12.5 diameter Ball Mill. In the first operation (b) Chris has a stock allowance of 2.0, a Mixed cut direction, a 46% Stepover and then sets the Lowest Z Containment to 23.0. This is followed by the same operation (c) but with Stock at 1.5 and the Lowest Z set to 13.5. Both (b) and (c) have Engage and Retract motions set to Linear but with zero length and Approach and Departure motions set to 0.6. This allows the tool to start cutting while centered on the inner edge of the stock left from the previous Profiling operation.