tinkerer

The fundamental difference between the two is that Keynes is something of a tinkerer.

It was standard for the tinkerer, for the would-be designer of robot bodies.

He was a natural mechanic, a maker and tinkerer of machines; he lisped in blueprints for the blueprints came.

He was something of a tinkerer, and he enjoyed adapting his environment to himself.

Had she recognized him as the smudged tinkerer of the stalled car?