The Feather As-D2 safety bar has two elevated keyways that keep the blade locked in place with the top cap. I just loaded my razor with a fresh blade and will shave with it on Friday. The Blade is perfectly aligned as shown in the attached photos.I wish other Feather owners would show up and add more comments. I have no personal experience with one. If you put the blade in.. with the slots lined up... in other words, do things properly... the blade exposure should be the same, side to side.