Am always looking for improvements in my methods. Sometimes large and sometimes small. Previously, I used an angle hook to cut the grooves for the string at 90 degrees across the upper saddle. But with a long ruler between matching string pin contents and the mark on the upper saddle, you get an extremely small but correct slope on the cut. The string passes the upper saddle in a more natural way, the cutting becomes an extension of the string and the string bends off only once instead of two. Maybe the string slides easier. The difference is barely visible, but it exists!