I would torque all the caps, then plastic gauge them one at a time.
Or else torque the cap with a bearing in it and then measure it with mirometers, then measure the crank with micrometers.
I would take the crank to him and ask him to measure it with micrometers in front of me to verify that all of the journals are the proper diameter. Mark down all of the measurements, then ask him if any are different than the others.
Keep in mind, that you should only torque the bolts 5 times, then I would replace them as they may get too much stretch after that.