Reinstalled the gas furnace (it had been removed) replaced the original Dometic 211 3 way fridge with a Norcold 323 which is 3 inches deeper than the Dometic 211 and same as Dometic 2193. I have built a 2 inch extension on the exterior shell bottom and only took one inch of floor space on the inside space.
Exterior
I installed a top vent cover, so it can be left open even when raining. I've got a Sunbrella awning and added a portable outdoor kitchen set that holds a two burner propane stove connected direcly on the front tank whenever needed with an extension and Y valve adaptor.
I welded two jacks under front corners to reduce RV swings with only a central jack near the end of the towing pole.
Customization
I changed the original gas regulator with an automatic switch valve for two 20 lbs tanks, so I won't run out of gas for other appliances without warning when using the gas furnace.
I replaced all 12 volts interior light bulbs with LED bulbs and added a RV battery to provide weeks of light and power to recharge cell phones or cameras,
Renovations
I replaced the Bargman lock with a refurbished unit found on Ebay, replaced the cracked door window with unbreakable lexan sheet
Other Information
Electric brake assemblies and hubs were replaced two years ago.