I added a Harbor Freight Tongue box, added a charge controller and moniotor, and changed out all the locks on my Roo, Global Link Locks and Keys | RV Door Locks & Keys | RV Locks & Keys
Now 1 key opens everything on my Roo, including the tool box. Better yet, it isn't the same key you all have.
I also added a second spare tire carrier to the bumper. Now that I've upgraded my tires to load range D, rated for 81 mph, I hope to never use either spare, but you never know.
I put a rain overhang made from 2" flashing to keep the water out of my bunk ends.
I put a folding extension handle on the door to help the DW get up and down the stairs.
O.K. I didn't get this all done in one day.