1.  Flap actuator bar covers were fabricated and covered with scuff resistant material.

2.  Floors are now fastened with screws instead of rivets for easy access.

3.  Hard points for baggage tie down fixtures were installed.

4.  The bottom rear side panel  is now removable.

5.  Two .016 aluminum side panels (top) were fabricated

to hide insulation (I think it looks nicer too).