I have a 3" 686 7-shooter fitted with the white notch/orange front sights you have described. i thought i would really like to put a set of night sights on it, but i am not a gunsmith, and I won't risk mucking up my S@W to save a buck. I believe any change to that front sight calls for a gunsmith in my case. Looking at the rear sight, it looks like it would be pretty simple to change that out to the white notch version, just ask S@W to be sure. That combination works very well at the range so I'm happy with my "stocker" and plan to keep it that way.