I got this. Hope you don't mind, I clipped out stuff NOT relevant to my comments.
I prefer a "universal" post type clip over any of the gut poking, never fit your belt built in spring clips.
So...
the first thing I did was remove the spring clip completely from the holster. Then, I trimmed up one of those "universal" posts to fit between the top of the arch and the "post hole" that was left after I removed the clip assembly. In the pic above, you can see the "arch" behind the clip.
Once I got it where I wanted, I put a touch of superglue to hold it so I could drill a very small hole (matches rivet) then put a pop rivet thru it for a secure permanent mount.
Of course, you now have a little rivet and hole on the felt side.
You can fix this 2 ways. For a temp fix, I put a strip of black elec. tape over it and verified the screen did NOT touch. It doesn't. That area is indented. For a perm fix, I got some of the very thin sticky felt at a crafts store and stuck it on. Works well. Works with all of the "universal" belt clips, accessory holders, car mounts, bike mounts, etc.