Humpa and TAH, here are the pictures. TAH, you're right. I don't stitch the pocket all the way. I keep the pocket height so that at least the top 1" of the shortest knife/tool/phone sticks up above the seam, so that I can more easily grab it.
Here is the basic seam. The jeans are Wrangler Carpenter pants, which is essentially the primary pants I wear. The seam that I've added runs vertically from the bottom of the pocket to the the horizontal seam of the pocket. I bar tacked the top of the seam for durability (just run the sewing machine back and forth a few times).
Untitled by
Pinnah, on Flickr
Here is the pocket with my (decidedly old fashion) cell phone and a big lock back (I happened to have my Schrade 51OT with me). You can see that the phone and knife are both about an inch above the seam of the divider.
Untitled by
Pinnah, on Flickr
Here is the pocket with both the phone and the 51OT in the pocket so you can get a sense of the imprinting.
Untitled by
Pinnah, on Flickr
I've been carrying my cell phone like this for about 5 years when I ditched the cell phone holster (which I hate and which was destroying my belt, my pants and jackets). For day to day activities like getting in and out of cars, moving about the house or office, sitting, standing and moving about, I've not had any problem with with pocket ejects.
I have low back issues and do a lot of floor exercises and stretching and
I will get pocket ejects when laying prone on the floor. The same thing will happen if I have to crawl under a car on my back or some such.
With the 110, I would consider making the pocket a bit off center and thus narrower. I would also keep an eye on pocket wear. IME, denim and canvas (canvas like Carhart is worse) wears from repeated folds in the material so something like a squared bolstered 110 or 112 can wear out a pocket in the same way a snuff can will (I don't chew, just noting it).
Hope this helps.