It sure sounds like some of you who don't put blocks under the front jacks have never boondocked and/or never camped in a campground where the so called gravel that is spread over the site gets so soft after a rain that the front jacks almost disappear after sinking into the ground. I use 2 2x8s under my front jacks and also the yellow weight dispersing pads. I use them under my rear jacks as well. If you don't put chocks down before unhooking and pick them up after hooking up, you're a disaster waiting to happen. I guess what someone means by blocks can be misconstrued by others.