I bought these clips from Fasttech a while back in anticipation of putting them on a few of my lights, mostly for the XIAOZHI when it arrived. I first tried it on a zoomie EDC that I have and it's OK. One thing that bugged me was the length of the raised end. It's too long and pokes into my hand when I'm holding the light. It also tends to get caught on stuff when clipped on my pocket. So I finally decided to fix it. About three minutes with a Dremel and voila! Much better.
I used a standard glass fiber reinforced cutoff disc, went slow on the cut, shaped it the way I wanted, then smoothed out the edges.
That's it! Nice and easy, and makes this clip much more useable. It looks like a minor change but it makes a big difference.
Yeah. the tiny nuts and bolts can be finnicky if the switch boot is too close to the rim of the tail.
The loctite is a good idea too. I’ll probably have to add that