Jobs turned to an early Apple consultant, mechanical engineer David M. Kelley, to implement Esslinger's design. At first, Kelley worried that Jobs's demands - for instance, a tilt mechanism for the monitor - would be too difficult to pull off. ''You want to be the voice of reason,'' says Kelley. "But when I would say: 'Steve, that's going to be too expensive,' or, 'It can't be done,' his response was: 'You wimp.' He makes you feel like a small thinker." So Kelley and a team of six engineers worked around the clock to turn Esslinger's design into a mechanical reality.