Would this tool be easy to build?
How hard would it be to built a device a that allows a lock picker to practice lifting tumblers one at a time, and get an instant readout on a dial as to how he (or she) is doing, one dial for each pin. or be built to read out as a series of light-emitting diodes or L.E.D.’s and set to signal if a tumbler other than the currently worked tumbler is accidently lifted.
Are we talking something the average lockie could build or something Bond's Q could only do.