Rebuilding the Back Staircase

I have been rebuilding our back stair case for almost three years now. I've been doing it in stages, one part at a time. Structurally it's fine; it's just that the wood was never sealed and was very dry, weathered and weak. I confess I wouldn't know how to build these stairs from scratch (look at all those angles!), but I do know how to follow the work that was done, removing components and using them as templates to build new ones. I am glad this project is finally completed so I can move on to redoing the tile in my bathroom.