Nikon Cable Release - Watch out for autofocus

I am very satisfied with the release - BUT I had to discover that switching to manual focus will give instant reaction to pressing the release button. When I used autofocus it took forever for the process to initiate. I take 3 images at different exposure and use blend them using HDR so being able to take pictures quickly is a must. I walk carrying the tripod with camera attached. I wrap the cable around my neck strap (attached to camera)and that helps keep it from dangling. I find it difficult to screw on the locking collar but I'm willing to live with that and am looking for some kind of lightweight plastic "wrench" to help. Haven't had it long or used it much so I can't testify to longevity. I would buy it again.