Very interesting approach, Phil. I like it. I agree with Panache and McMurdo - jacket open - it allows the vent to hang better.

Something bothers me about the front, though. Do you always wear your sporran that high? I think if you wore it lower, you could change the arc in the front a bit so that it would cut away more gradually from just below the buttonhole. As it is now it seems too severe an angle. Just MHO