I need to reno an area roughly 4000 sq. ft. There are some high spots and some low spots with poor drainage. My hope is to move soil from high to low areas (duh) and overall leveling for seed bed prep. I am going to rent a mini skid for this work. Would a harley rake (aka power box rake) do an effective job: http://www.toro.com/professional/sws/loaderattach/ground/22425.html or do I need a blade: http://www.toro.com/professional/sws/loaderattach/ground/22414.html The high spots are hard dirt/clay roughly 1-2 feet above the lower portions if that helps.