If you enjoy the task of chipping plaster out of a test socket or definitive socket, this video and tool is not for you. For the rest of us, check out the extractor from Coyote Design. What I like about using the extractor is that I am able to save the mold. I can always go back to the original mold to make a modification without having to take the socket back from a patient.
NOTE: The extractor does not work if a Patella Tendon Bearing bar or deep underbelly is part of the plaster mold. Coyote Design claims that 80%+ of sockets can be removed without any problem.