1- Added a set of speakers in the master bedroom.
2. On our 2013 SP 260 the television rotated clockwise. I re-did so it would rotate counter clockwise to make it better viewing from the dinette.
3. Installed a 20 inch long, 1/4 inch wide strip of reflective tape centered and plumb in the front of our camper. On my rear window I have an inverter V. I use that for line up when backing in to hook up the camper.
4. Glued small pieces of 1/4 plywood behind many of the stripped screw through out our camper.
5. Command Hooks!
Since the thread is top five I wont number the ones I forgot about, LED interior bulbs, and I rekeyed all the outside locks match the key on my tonneau cover.