Replaced the center gear and since they sent the hub along I replaced that too just to be safe. Used the live chat before ordering to make sure I was ordering the correct part. The person I chatted with was very nice and very helpful and parts came in good shape, and just as ordered. Replaced the stripped gear the next day and added a bunch of grease and the mixer works like new. Was very impressed with their diagrams and helpful videos as well as their large selection of parts. The other parts I ordered, the vertical shaft, pin and gasket are for my daughter-in-law's mixer - it's been out of commission for 3 weeks as it was leaking grease. That is an older mixer and I was afraid we wouldn't be able to get parts, but they had them and as soon as I can get together with her we will have hers fixed up as well. I particularly like their helpful videos. I can't tell you how much I appreciated that. I generally work on my jeep and maybe general construction around the house. I had never taken apart a Kitchenaid mixer before and while I would have attempted it without the video, it certainly went much smoother with some instruction. We live in a small town, and no longer have anyone around to work on this type of thing. Most products are made to be disposable, so I suppose as the older guys have passed no one wants to take it up. I might have figured out how to get into the mixer without the video, but this was very helpful and the only other solution is to ship it off to one of their service centers and wait a month for it to be fixed and returned. Appliance Parts Pros prices are reasonable and I will definitely be doing business with them again. Thank you. (I want to note, below where it asks how difficult it was to repair - if I had found your web site 1st instead of some of the others I was on prior to that - it would have been an easy repair)