Replaced both the Spray Arm and the Spray Arm Water Supply Tube.
Highly recommend replacing base plate whenever the Spray Arm Water Supply Tube is replaced. Plastic tabs on the base plate hold those parts together and are likely to break (as seen on Appliance Parts Pros installation video!!!). I sensed tab weakness so just transferred parts needed from the new tube to the old tube and reinstalled the original tube / base plate assembly rather than risk breaking those plastic tabs. I should have ordered the base plate, but did not watch video before placing order.
You'll need a common screwdriver to unspring tube retention clips as well as a Torx-20 driver to release the base plate.
Spray arm replacement was straightforward.