Followed the excellent videos attached to each part. I had previously replaced the water tank when it had a terrible odor, so already knew how to remove water lines from valve and connectors. Water valve and ice machine fill line took me about 20 minutes. Hardest was when I pulled the old fill line out, the plastic nozzle was stuck in the freezer compartment. Had to work around it with a small screwdriver and pull out with long nose pliers. Maybe I didn't allow the freezer to warm up enough and it was still a bit frozen.
Helix wheel was a quick repair...just forgot the washer and e-clip and remembered it after I snapped it together. Replaced the drive cup while it was apart as the original was showing a bit worn on the edges.
All done in under an hour and works like new. Saved me a trip to the appliance store as the wife thought this was an excuse for a new refrig.