Congrats on your Surveyor 220! We have had ours just 3 months and 2 trips and just love it.
I just wanted to point out that the sub forum for Surveyors has some really good ideas for maintenance and mods for you to look at. Most of us suggest living with the trailer for a couple of trips before doing any mods or updates. I only swapped out the bathroom door for a folding one so we could access the bathroom easily without opening the slider when stopped by the side of the road (medical reasons).
Enjoy your new trailer! Just keep asking question; lots of answers out there!
2013 Forest River Surveyor SP220 Sport
2012 Ram 1500 4X4, 5.7L Hemi quad cab