I havent had issue with the 12 volt plug being loose. I think if you have something plugged in and tilt the armrest up, and then get off of the air seat, the arm rest can come up and possibly unplug or break whatever is plugged in.
This was my first year for an air bar. It created more trash on the feeder house than normal. I once fully raised the header at the headland to clear something in the field. As doing so I heard a loud snap. The trash cracked the lower cab shield.I was able to reposition the shield to make the crack nearly invisible. While talking to All State Ag Parts, I brought this up and they said they seldom get one in that isn't cracked, or it is sold quickly if it is good. So, FYI, don't fully raise feeder with a lot of material on it.
I would think the MAV chopper would/could be made to suck more air from the feederhouse, and then use that air to project the straw better.