It was simple to replace. I removed the two springs from the sub ass'y, then removed the two screws from the top of the microwave holding the sub ass'y in place. I then slid the assembly to the left about 1/2" and pulled straight out completing its removal. I then removed the three screws holding the metal hinges to the sub ass'y.
To reassemble I just reversed the proces.
Total time for removal and reassembly was about 15minutes.