Rake for rocks? Box blades are nice too, to fill in the trench. I just wish I had a "float" setting on the Kubota 3-point.
Box Scrapers are wonderful tools. I doubt you would need a float with a box scraper.
What Kubota do you have?
I have an L3540, and will eventually boot that out for a larger model or different brand. Just not up to my expectations.
