We use 1" aluminum angle and flat stock to make the top fabric attachment plates. Even with the plates notched for the flaperon assembly clearance, it is very strong and keeps the fabric nice and tight on the tall sides of the fuselage.

We make a rear fabric attachment plate kit that replaces the FG-99 plates that come with the standard Challenger. These plates make the center section that surrounds the elevator bellcrank removable for inspection. It also includes a plate that mounts on the bottom of the longerons which secures the fabric on the bottom and triangulates the area in front of the tail section.