I see jack boosters on line for jeeps that have a lift and the stock jack can not extend far enough to get the tire off the ground. They do not appear to be better than using a 4x4 or 4x6 the make up space to lift the tire off the ground am I just being to hillbilly or do these do it safer or better ? 40 to 80 bucks for what appears to be a molded piece of plastic seems pretty steep.