Installing curved brace on site

Installing curved brace and fitting steels went well without any trouble. Though, I simulated the process of lay out, cutting and placing for a couple of days before I went to the site.

The most important factor that need to be consider is the twist in a curved timber. I can not assume the flat on curve timber are really flat, they are twisted. To deal with you, lay the piece on saw horse and set flat in level on both X and Y direction. If you find all the surface is level after, it means piece is flat, but you will see if you set one side level then other side will not, so find happy medium.

Then lay out all with level, square on line does not work! I used several trick to lay out this also drill the hole in a corner without jumping drill bid all over the place, but I did not had opportunity to take picture.