Here's a picture of my newly modified blade. Last winter, my first with the blade, I managed to bend the ends a bit on ice chunks frozen to the ground. I also found that regulating the height of the blade using the caster wheels was not really effective. The casters are mounted too far back and are too spongy to maintain a level.
I bought a pair of replacement shoes for a Fisher snow plow from NorthernTool.com and a pair of 1 inch forged steel socket weld tees from MSC. I bored the tees to slip fit the spindle of the shoes, then shortened them a bit to give me more adjustment range. And put in some grease fittings. Then I went off to a welding shop and had the blade straightened and a piece of 3-1/2 x 3-1/2 angle welded full length to reinforce it and the tees welded to that.
Sorry about the mud in the pictures, it's all I had for a test,
Sedgewood