I think adding a piece of flat bar to them will make them cut better. If I had an extra blade around, I would have built one. The one's they sell now are not that impressive, IMO.
If you want, give me a couple pics of that blade and some measurements of it. Add a few measurements from you Cat sleeve hitch and I can draw something up. They are really pretty simple.
Ya, I think the flat bar is good. I was actually thinking of winging the box blade but lol.. I had the same thought about the tow dolly (mabey I will weld the axle to the tongue this weekend lol). I think the tow dolly was improved by your work on the drawings.
The blade is a 54 inch home made deal and It is way heavy duty for this, just have to check it's angles, see if it's possible... and 54" wide will definitely need to be cut down to 48" to make it less abusive on the tractor. I need to get the tires mounted before I can even get box blade designed and built right... Can we hold off til I build the dolly and get the new tires on the Caterpillar to work on a box blade?? lol
The hope would be that cultivator shanks would work ok, especially since I have a bunch of them for David Bradleys lol.