I suggest you call Justin Humphreys, VP Sales at Airstream in Jackson Center. He is responsible for the dealer network and should be aware of this situation.
The suggestion of hiring a good RV tech for a few hours is good if you can find one. Finding one may be a problem. I paid good money to two techs, one at an Airstream dealership and still didn't get the adjustment right. If you can't find a good tech, and don't feel comfortable doing it yourself, you might call someone at a local WBCCI chapter or contact one of the local Airstream inspectors on AirForums. I've found Airstreamers extremely happy to help other Airstreamers. Almost certainly there is an Airstreamer at a nearby WBCCI chapter who has extensive experience with your brand of hitch and who will spend some time orienting you to your trailer.
Airstream - 2008 Safari 27FB SE (Sweet Pea)
TV - 2011 Ford F250 Lariat, 6.7 Diesel, 4X4 (Brutus)
TAC FL-55 | WBCCI 3823 - Unit 12 | AIR 48265