Excellent job so far. You will want the angle capabilites. Take a look at a BOSS "V" Style plow if you want something serious. With what you have built sides will provide the most bang for the buck. To keep them from bending rebar can be welded from outer edge back to a point 16'' in from edge of blade. This should be about half way between top and bottom of blade. I am making something similar. Just taking a box blade and putting it on the front of a 743 Bobcat. Good luck and continue the good fab work.