I put some epoxy on last night, and it seems to be holding well.

The holster didn't really wear it out, it just has (had) a very thin piece of square sheet metal with a hole for the pipe holding the rear part of the light pipe in place. The front of the sight had a more solid, bigger piece to hold it in and I wish they would have used that on the back as well. That thin piece drug along the top of the holster sight channel and bent while carefully holstering and unholstering a couple of times and the bending broke the piece off. This holster has a very pronounced sight channel, but not enough for the taller sight. I will not replace it with a Marbles, even though I REALLY liked the sight picture.

Ultimately, the higher sight is too high for the sight channel in the holster. I'm going to try a more "robust" front sight in the future to see if it works. For now, the epoxy should work, but the taller sight does definitely drag on the holster. The original ramp sight does not cause any problems, and barely contacts the holster.