I replaced the upper arm support and the spray arm and the supply tube. Replacing the parts was easy. I only needed a Phillips screwdriver not a 5/16” nut driver as mentioned in the video. I pre-screwed the screw into the upper spray arm mount to have the groves already there when I installed the new spray arm. This made it easier when screwing it up from the bottom.
The supply tube did not line up with the water supply port at the back of the dishwasher, but after one quick rinse cycle with hot water, it helped mold it to a better fit. Be sure you hang the water supply tube support in the right direction so the arm can spin freely. I had to take it off and turn it around because I didn’t know it made a difference as to which way it hung.