Larry drills the pin holes and slots the bridge.
Here is a mixture of the three woods comprising the structure of bridge system: Macassar Ebony, Carpathian Spruce, and Black Locust.
The pin holes are chamfered (sloped at the top). Note the right angle at the top of the holes.
Now the tops are sloping.
Now the bridge is slotted. Using this elegant tool, the distance from the nut to the 12th fret is found.
It is then duplicated between the 12th fret and the bridge.
Router time.
Voila!