Chipbreaking theory *LINK*
Clay C in Miami
>No matter what type of chip you're seeing, THIS plane will take care of it. The short-lived product of an illicit joint-venture monopoly attempt by Stanley and Norris, this model's very existence was kept a secret from Teddy Roosevelt's Trust-Busters. By using two lever caps simultaneiously, the makers hoped to bamboozle the newly-forming class of gentleman-hobbyist woodworkers just coming to be recognized as a market force.
Leverage galore ...