Originally posted by Rik Rabbit ... I've found you can activate the shutter from directly behind the camera, above and below, though only on the right hand side. I suspect that this is because I am working indoors. It seems unlikely to operate as helpfully outside. The IR beam presumably bounces off the ceiling and/or walls. Anyway, it works for me.
This works for me too, the IR remote is not too picky and just needs something to reflect it into the IR sensor on the front of the grip.
Indoors I just aim the remote at something in front of the camera. Outdoors, I usually point the remote at the right side of the camera, remote has to be just forward of the grip.
If I can't hold the remote there, I put a small Post-it note or small piece of tape attached to the left side of the grip, extending over the IR sensor (red light), not quite touching it and past the right side of the camera. With this setup, I can use the remote from behind the camera, as long as the remote is slightly to the right. If I can see the red light blinking on the post-it, the remote should work.
I've never needed any other aids, but you can use almost anything as a reflector. I just tried setting my camera bag a few feet in front of the Kx, and it worked fine. You don't need a mirror, but a white piece of paper would probably extend your range. Range usually isn't an issue from behind the camera.