Unplugged and unscrewed Advantium Oven. Pull it out with the help of a friend as it is heavy. Removed the two screws on the top access cover and removed it. I removed the plug and discharged the capacitor just in case with an insulated wire to the ground. I needed a long #2 Philips screwdriver to access the 4 screws holding it in place. I swapped the thermostat from the old unit to the new unit. I used tape to hold the screws on the tip of the screwdriver to get them back in the holes. I swapped the old mica cover for a new one because the arcing splattered metal from the tip of the old magnetron and did not want any metal interfering with the microwaves coming out of the cavity. (The labor estimate for the mica cover was wrong) A couple of minutes at most. Plugin the magnetron and thermostat and button it up. Test it with a cup of water and good to go.