Building Winder Stairs

*In the video, it is explained as a spiral staircase, but the correct word is winder stairs. In this video, I'd like to show you one of the biggest works for carpenters. I'll process the winder stairs of 5 steps manually. If it has only 3 steps, it's not a big deal. But to make 5 steps is hard work. I'll use red pine. I think it will be beautiful.