I looked for canopies at the local tractor dealers. One was made of 0.060" thick aluminum and was all bent up along the front. It was a customers tractor. $325 for a new one. Another tractor had one that was .090" thick aluminum that had a few bends. New cost is $425. Bends bug me. I wanted thick, so I built this one.
I checked at the local fab shop and bought a 4 x 8 sheet of 0.125" thick mirror finish diamond plate aluminum for $170 and also some angle. They cut the sheet to 60" long with a plasma torch no charge. The sheet metal shop broke 1.5" lips on the edge for $10 cash. Got 4'x8' "asphalt sheathing" at the lumber yard for $6 for thermal and noise insulation. Got a 4x6 flood light $16 at TSC. Black + white rustoleum = Kubota gray.
On the two short lengths of angle frame I cut three notches with a chop saw, bent the angle, then welded the cuts. This added a crown bow to add stiffness and keep rain from standing.
I think this turned out better than the factory canopies, at half the cost. The larger twigs I have run into have not damaged it. No branches yet, however.
Hope this helps someone.