McSpadden, whose pace is a notch above the others, breezes through the routine at the job he's been doing for 16 years. He must sink slightly into the chair, but not too far. Any chair too plush or too firm is sent back for restuffing. He then rocks back and forth, making certain the chair is properly balanced and free of any hitch. People just don't have a clue.
Training can take up to two months.