The master could assemble a caliber in forty minutes. Lena had watched him do it twice that morning, his tweezers moving between the parts with a certainty she couldn't separate from speed. The balance wheel dropped into its bridge. The click staff seated against the pallet fork. Each step arrived at the next like a sentence she already knew the end of.
"Again," he said, sliding a tray of components toward her.
Lena worked slowly. Not from incompetence — Holzer had said she had steady hands, better than most second-years — but from something she couldn't name. A reluctance at each junction. The mainspring barrel sat in the plate and she paused, tweezers hovering, because there was a moment before seating the center wheel where the barrel could go in at any of three orientations and only one was correct and the other two would work for months before the increased friction wore the pivot.
Holzer never paused there. His hands chose the right orientation from some knowledge below language.
"You're thinking too much," he said, watching her. "It should be like breathing."
She nodded. But the pause wasn't thought. It was the space where the choice was still visible — where the three options were still three options, before expertise collapsed them into one.
By afternoon she was on her fifth assembly. Holzer had done nine. The difference wasn't in the product: her movements passed quality control identically. It was in the time.
"What are you looking at?" he asked once, genuinely curious, when she stopped for eleven seconds with the pallet fork in her tweezers.
"The impulse face," she said. "The angle."
"The angle is correct. I checked the batch."
"I know. I'm looking at how much room there is for it to be incorrect."
He frowned. Not with disapproval — with something closer to recognition. "You'll stop seeing that," he said. "Once your hands know the right one, the wrong ones disappear."
She understood he was telling her this as encouragement. She also understood that the wrong ones didn't actually disappear. They just stopped being visible. The tolerance was still there. The near-miss was still near. The hands that moved with certainty were hands that had stopped seeing the width of the acceptable range and started seeing only the center of it.
This is what Form 4 was about, but slower: the training procedure that teaches correct assembly also teaches you to stop perceiving the space around correct. Holzer's forty minutes contained no choices. Her two hours contained hundreds. The same work, the same result, but hers still had the map of everywhere-it-could-have-gone-wrong visible in the pauses.
She finished the sixth movement at 4:15. Holzer examined it under the loupe and set it down.
"Clean," he said. "Try to get that down to ninety minutes by Friday."
She said she would. Walking home, she thought about the eleven-second pause. How the pallet fork sat in her tweezers with its impulse face angled exactly right and its tolerance invisible to anyone working at Holzer's speed. How his expertise was the collapse of that visibility into reflex.
She didn't think she was better. She thought she was seeing something that would shortly become invisible to her, and she didn't know how to mark where it had been.