I have the RM1350 and I did a few mods to help with the cooling.
I changed the 3.5" computer fans on the backside of the refrigerator to 5" size and added one more. The fans can be purchased on ebay or at a computer store for under $10 each.
Since the refrigerator is in the slide it does not get the chimney effect to evacuate the heat like a non slide unit that will vent out the roof rather than the side of the slide. With that situation the air does not flow across the top fins. Here is where I added a baffle to direct the air across the top fins.
I have attached some pics that may help you understand what I did.
One more thing, while you are back there and before installing a baffle I suggest that you change out the white drain hose.
Peace
Dave