Alan F nailed it, you need an agregate head.
I too had trouble keeping tooling intact trying to make this cut. We used an amana insert bit to do the v-groove and I bent the tip of the bit (insert broke) and had to finesse the bedding surface back into service. The key is to waste out as much as you can with a roughing pass using a straight bit, and step the final pass in. No matter what we tried, we could not get a good final cut. I think this is mostly because the tip of this style tool is essentially speed zero at the point. If you have an aggregate head, or a way to cut this with something like a shaper cutter (think plowing a dado, just with tapered sides) then I think this could be a productive method. Our CNC Router is only 3 axis, so we couldn't justify the cost for the volume we do, of adding a an aggregate head.
The 45 degree miter fold (for things like drop edges) seems to work OK but It is not perfect on our machine. The bottom of the cut fuzzes up and fills with the chaff from the "slow" moving tip. We clear it out with a pick and some compressed air.
Hope this helps.