Congrats vrunner. We picked up our 2016 Greyhawk 31FS last week. No vibrations issues but I haven't had enough time behind the wheel to see if I need alignment. Taking her out this weekend for the shakedown!
A few things I've done so far:
Moved the rear leveling jacks to the correct height, (they were too low, ~6"). Added air bags to the rear for getting up my driveway.
Did the TV mod so kids can watch it while on the road.
Re-wired the water heater control panel (the scotch locks they used weren't making a good connection).