What will go wrong? The base of the Chamfer Gage will probably never fail you. If the 3-winged gaging plunger becomes damaged or worn, it can be replaced without any special tools. Simply unscrew the knurled ring, remove the old plunger and reassemble.
Since neither Starrett nor CDI makes a particularly durable indicator, chances are you'll eventually damage the teeth on the rack. This can be repaired or replaced. These indicators have special ranges, so you can't simply insert another model into the base. As mentioned before, you may end up forgetting what the "Set To" value is if you don't write it down or permanently mark it on the gage.
The Science of Measurement
Oxford mathematician Marcus du Sautoy (The Story of Math, The Code) explains how humans have succeeded in reducing the chaos and complexity of the world to just seven fundamental units of measurement—the building blocks of modern science. Embarking on a journey around the world and back in time, the series shows how measurements have shaped the course of history, science, and civilization—and changed every aspect of our daily lives.
Winner of the London Mathematical Society’s Berwick Prize, Marcus du Sautoy is the Simonyi Professor for the Public Understanding of Science at Oxford University. He has presented many TV and radio programs and has authored numerous books, including Symmetry.