I do 2 things to help with your situation. First I turn the blade around so it arc's the opposite way. This keeps it from digging in. second, I have a manual 4-way blade that allows me to tip the blade left/right as well as angle it. I angle it at around 30 degrees but I just pull the other pin and allow the blade to follow the contours of the road. This eliminates any high pressure spots. Have no problem with pulling gravel now.