I am told the box blade( yes i have one) is the best way to spread and level aggregate ie sand or shell rock. Problem is if ya have say a 10 yd pile of shell ya want to drag and spread evenly without wasting material you are constantly working the the blade up or down becasue the tractor moveing fwd is never on level ground so how can you set the blade for a even height of base? I find it easier to drag and level backwards useing my loader blade. At least I can see and feel when the tractor is on level ground. Am I crazy?