Followed the bouncing link ......
It seems you're pushing into the dirt and lifting? Lather, rinse, repeat as necessary? Can you drive forward with it contacting the ground to scoop a ditch? Yes I can do that to clean out a ditch, but you will still have to "loft" the bucket every couple of feet to clear out gathered out debris. Can you install it backwards so you can tip the bucket edges straight down and drag a ditch backwards?I wouldn't do that with the tractor bucket, I would be afraid of bending a curl/dump rod on the FEL if you put much weight on it.
That's why I want one for the BH, so I can use the same type motion as I would to dig, but with a narrower and rounded result.