Earlier this year my Dometic went kaput. I came really close to doing as you are. Chickened out at the last moment. (thanks Steve) Main issue was I didn't want to run more wires from the inverter. If you haven't already bought the fridge try out
www.compactappliance.com I don't remember which one but they did have one that would have fit without cutting my opening.
Good luck, and where are the pictures?