I don't know of any. It is a long and sometimes frustrating learning curve with the boxscraper. The loader is typically easier to get a grip on, partly because your usually concentrating on one area with it. With a boxscraper, the problem I see is folks driving off expecting that the boxscraper will know what to do as it passes over the surface. Not having a hydraulic top link compounds the problem as it is much more difficult to get just the right "bite" with the cutting edge. Often times you do not want the edge to cut at all. Washboarding seems to be the chronic problem that we have with the boxscraper. A boxscraper requires constant driver attention and adjustment. Go slow, look back and routinely lift/drop the box as needed to get the ground reasonably flat. The angle on the box is just as critical as it is with the loader bucket. With the loader, you control that angle with the bucket control, for those without a hydraulic top link it means getting of the tractor and manually turning the threaded adjsutable top link. It will consume a bunch of time but can be done. My suggestion is to tilt the box so the cutting edge is unused, its a good way to get an understanding of whats going on with out messing up the driveway with unintended cuts. You can do this by adjusting the top link all the way in or out so the cutting edge is not used. All the way out forces the rear cutting blade to ride over the surface. All the way in forces the front sides of the box to ride on the surface and hold the cutting edge off the ground. Slowly adjust the top link until you get just the right amount of cut. You can see where a hydraulic top link would be very helpful. Good luck and have fun. Rat...