You can somewhat check the alignment yourself--Select a solid point at front center of trailer, then measure to axle each side to be sure that measurement is same. That would square the axle locations with the frame. One at a time, or both--don't have a clue on that. After all is done, would be worth an alignment check before traveling far--one ruined tire can almost pay for an alignment.
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired