A Note of Caution
It is terribly tempting to refit the slot in which the saddle pin rides in the yolk. One should refrain from doing this altogether, because any upwards pressure on the pin can cause the babbit bearing in the saddle to wear out very much prematurely.
(By the way, the hammers that haven't been cleaned up for picture taking tend to look a lot more like the top of this picture than the rest of the pictures in this section. Hammers should be kept sloppy goey with lubricant and grease.)