I just purchased a Snow Wolf front blade. The blade itself is not spring-loaded to tilt forward if it hits an obstacle, such as a large rock or curb. Instead, the cutting edge on the very bottom is spring-loaded to rotate if it hits something. You can see this in the photo. All the snow blades I have seen have the entire blade spring-loaded, like the Kasco blade. Is one way better than the other? Anyone out there have any experience with the kind of blade I have where only the cutting edge is spring-loaded?