Uncle Roy's Computer Repairs and Used Robot Parts
Novella 18,748 words Recommended by 2 award/anthology sources
"Roy Harris perched on a stool in front of his new shop door, very carefully filling in the letters that Martha had sketched out on the window. She had a steady eye for that sort of thing. He could stay within the lines, but don’t ask him to put the lines in the right places, at least not in the real world. His old hands shook too much."
Quasar links out; the story lives on Analog, where the author gets the click.