I used the 500 S today to skid some logs out of the woods.Boy! was I impressed! It's new with only 26 miles on it but it was time to put it to work.I have 25" dirt devils.I was pulling Birch logs 12-16 feet long and probably 16-20 inches in diameter.The ground was soft and snow covered.Man! I couldn't believe it. Wish I had the camera with.Once I got moving I could shift up to 3rd. gear to keep momentum.