The cool little flashlight arrived in the mail today and I added a Spanish ring knot to it with 0.9mm braided nylon string. The string was white, but an orange Sharpie made quick work of changing the cord color. It's been a while since I'd tied this knot so I had to look in my copy of Bruce Grant's 'Encyclopedia of Rawhide and Leather Braiding' to refresh my memory.
gate clip to the split ring to make it easy to get on/off my key ring.
The knurling on the light gives enough grip to hold it in one hand, and use thumb and index finger to twist the head for on/off, and doing that quickly also changes the output from medium to low then high settings.
I found that the pocket clip from my Gerber Infinity flashlight fits well over the Fenix E15 body, so that I can clip it to the brim of a ball cap or boonie hat, for hands free use.
Getting a new flashlight always seems to lead to wishing for the Sun to hurry up and set, to properly test the light out in the dark. :)