I'm going to have JJ replace the rear blade on my Heym and have been evaluating options for quite a while. I have a question; it seems that most old British doubles have one of two types of rear blades. One type is the wide shallow V and one type has a flat top with a small sharper angled V. What are the advantages and disadvantages of both types?

My biggest challenge in shooting my open sights is finding the center of the rear blade. I have tried differing colors of center lines and differing colors of triangles, and it seems I have a difficult time seeing a line regardless of color and pick up the triangle better - white and silver best. So I was going to have JJ insert a traingle, but wondered which one of the two V designs to go with.