Suddenly, a new window popped up in the corner of his vision. It was his wife, Elena, from the kitchen. The garage had its own local channel.

"Leo? It's midnight. Are you coming to bed?" her avatar asked, her tone a mix of worry and weary affection.

He loved this part. The Visio wasn't just a diagnostic tool; it was a sandbox. He waved his hands, dragging a virtual blueprint of the Porsche’s engine into the air. He began to sketch. What if he replaced the stock fuel rail with a custom 3D-printed one? The visio calculated the flow dynamics in real-time, rendering a ghost-image of the new part over the old one. He adjusted the camber on the rear suspension, and the visio showed him a heat-map of the tire wear for the next 10,000 miles.