Here is what I'm thinking to do with the bucket based on your recommendations. The bucket size is 59 x 12 (bottom plate BLUE) x 5 (the angle end YELLOW). I want to use 3/8 metal sheet 59 x 17 (12+5) and have my local steel supplier to bend the sheet to fit well the shape of the bucket. In addition to that I would weld 59x5x5 with the bend inside the bucket. My one concern is the 59" length of the sheet and I was thinking if splitting it in half would make more sense and would give the large sheet better grip.
I don't plan to take the bucket off the loader and will need to weld vertical/overhead.
View attachment 667414
View attachment 667415