Have any of you folks worked with one of these? Recently, we had to install 150 tons of aggregate. However, installing it with our equipment would have involved too many labor hours and ultimately been cost prohibitive. I decided we could either use a track hoe or a stone slinger. The owner of the building didn't want a hoe swinging too close to the building, so we went with the slinger. One of my foreman and I, installed the aggregate in three and a half hours. Most of that time was just looking at each other freezing our azzes off. At a charge of $160.00 per hour, I was charged a total of $640.00 for the slinger (half hour travel to the job.) It was an amazing time and money saver for our situation. Certainly, it is not always practical or cost efficient to use a slinger, but it is a good option, for certain situations, that everybody should know is available (if, in fact it is in your area).