My KitchenAid 600 Pro mixer stopped spinning so I took it apart and noticed that two gears were worn. I found the replacement parts easily on the Appliance Parts Pros website and they came within 2 days. With help from an online video, I was able to replace the gears. It took about an hour and now my mixer works perfectly! This is the second time I've had to repair this mixer and Appliance Parts Pros has been great both times!