With the strut retracted, transfer the ball link position to the edge of the
door by marking the position with a straight edge. This is mark 2.
The vertical location of the center of the strut block on the door will align
with a point half way between the two marks.
While the glue is drying, cut a piece of 2-56 all-thread
to approximately 25 mm.
Install two nylon ball links on either end, threading
them on to the rod fully.
Snap this linkage on to the two ball links and operate
the door by hand. Adjust length of linkage so that the
door just fully closes without binding.
Repeat steps for opposite door.
Completed door strut installation, showing linkage and location of strut
block on the door.
Construction Manual
Der Jet F9F-8 Cougar Page 23