This is a mod that I did to my box blade so that it would be more user friendly. I went to the local farm supply store and all the parts that I needed was going to cost $465.00. So I went to Harbor Freight and bought the 40"X48" flat bed trailer for $229.00. And 90% of what I needed was in this trailer.
First photo box raised all the way up is 12" clearance.
Second photo is box lowered all the way which gives me a 6" deep cut.
Third photo is the 2X14 hydraulic cylinder and my hinge system.