Done, and works like a charm. With this in place, you can set how many days are required for delivery using each of the three methods (Standard, Fast, Express). Additionally, you can determine the earliest and latest hours of the day on which shipments can arrive. It will randomly select an hour between the options you give, and the cargo will arrive at that (full) hour.

If you put ALL five settings at 0, BR shipments will arrive immediately the moment you unpause the clock.