I was able to push the stones out to the main city sewer with the K1500 and the funnel auger head, twice the stones bunched up and had to clear with spade bit. This took 3 hours but worked out really good. I then got a company to come in and clear the main with a jetter/vac truck. All stone is out and there was a lot. Anyway, I found in this situation that the auger worked very well, no stones were left in the pipe by augering. Look forward to discussing more problems.