I have one of those 20' air cable releases with the squeeze bulb. I bought this many years ago and it's never worked right. What happens is when you squeeze the bulb it will work for one exposure, but then air won't get back in the bulb for another exposure. I have to unplug the bulb to fill it with air again. Very inconvenient to the point of not wanting to use it. Most of the time you have to really squeeze hard and fast to get it to fire. Does anyone know of a high quality model that doesn't have these problems? Maybe one like the bulbs you find on blood pressure testing thingies (sorry, I'm not a doctor or I'd be shooting Leica instead of Nikon). Can one of those be adapted to work as a shutter release?