I replaced the spacer, motor - turn and the cooking tray coupler. It took a little longer to fix than I figured but that was due to my old age.
Upon completing the repair the microwave worked like a new one. The total cost of the parts was a lot less than a service call to my home.
AppliancePartsPros.com make finding and ordering the parts easy and with FAST shipping. I found this is very rewarding in fixing it myself.