I do have the bevels on the front and rear of the openings. I did play with the nozzle overhang a bit but I am sure that it could be better. Is that the optimal setting, 1/16" ahead of the point the burner will take?
Just curious though, what is it that you see when looking at that flame that makes you think that it should be better? I just want to be able to see what you see so that I can better understand the process...