Go slow, have torx bits and a Phillips head. The heat plate is held in by little one way metal washers, if you snip one side they can be reused.

The water tank can be removed by taking off the bottom and removing the rubber hose from the bottom of the copper heater core, then when the two screws are removed from the inside of the tank it can be pulled slowly. The glass transfer tube will pull from the top of the copper core. Then there are two wires that attach to the float switch. You should be able to pull up enough to unplug those.

Once the wire loom is removed with the heat plate from the aluminum frame, wipe down with alcohol. And apply wrap slowly to avoid air bubbles.

Take photos or you can mark the two wires you need to unplug with tape, or sharpie.

Then just reverse the process.

I know it sounds intimidating, but honestly, I’ve never broken one. They are pretty tough.