Stairway prep

This is everything I’ll need to do the stairs: stair treads, risers, runners and trim pieces. Everything is laid out and properly slathered with polyurethane. Those 1×12 boards go up and down either side of the stairs and are a bit of a challenge as they need to fit in a snug space and they’re 13 feet long. Big and unwieldy and they need to be cut to length and be accurate within around 1/8 of an inch. This will be a magic trick if I can pull it off.