lock to lock

I seem to remember 3 1/2. Tell that fool to center it, see how much it turns to the right, bring it back to center, how many to the left. Mentally use spatial relations in his mind, and put the wheel centered from lock to lock. Unhook the tie rod ends, and now center the wheel. Without moving the pitman, re-adjust the arms. Then fine tune it. Have the computers made the techs brain-dead?