This is what I noticed while shooting the 34 equipped with a thin F/O front. I can see the rear clearly but the thin front was fuzzy, making it difficult to determine if the sight was amply centered in the rear notch, and the top of the front sight was actually somewhat level with the top edges of the rear. Squinting a bit helped to see the front a bit more clearly but for some reason, the bloom of the fiber optic made me see an irregular shaped blob rather than a circular reference.
The thicker sight on the shorter radiused 17 gave me enough to see if the sight alignment was sufficient. When I was in my 30s, I used to wonder why the older guys needed a bit more time to break their first shot. Now, I better understand the pains they went through.