Removing and replacing the Norcold 1200 with the RF18?

Put one in my Essex. Sealed the top and the outside access. All air movement is thru front lower grill bellow freezer door. Use a pull strap on top handles and bunge across freezer door while traveling. Best mod I did. Freezer down to temp in less of an hour. only 170 watts on the inverter. I scrapped the lower plastic filler and made a screen out of speaker clothe across the bottom for ventilation.