Repairing a beat up and rusted out Brush Hog

Trying to add a few more years to this worn out brush hog. Added some flat stock a buddy gave me, as well as some scrap rebar I acquired around my job site. I'm not a professional welder by any means, and thats ok. It doesnt have to look pretty.

Not sure what brand brush hog this is, although it did have a sticker on the side that said 'BUSH'. Either way, its old and worn out. My buddy uses it to clear trails on his farm land during the fall season.

Tractor is a Mahindra 1626
Welder is a Millermatic 211
Also used a Dewalt 20v Grinder and Grease Gun.