How to make a rustic wood bench, MAY DIY

This is not my first bench, and I think it will not be the last. I love working with furniture and there are many models that I want to make while I repeat them, but I am sure that the day will come when I will draw, design and make my model. I found this bench in the excellent Pinterest service, I often go there to get inspired. This bench will most likely be in my sister s sauna, where our mother goes to relax every week. True, I already made a bench for a sauna not so long ago, but my sister decided that she should stand in the house) I decided to make this bench even larger, more stable, from a beam of 100 mm, so that, being in a humid environment, the tree would last as long as possible. I decided to use 40 mm boards for sitting, and in order to sit comfortably on them, I must round off the ends of the board with an edge cutter and a hand router. The boards for the sitting have been drying for about a year, and for the bench sides I have used a completely dry board which is probably already 10 years old,