RE: FEJ F-4 Twin
William,
The problem with the canopy locks is due to lack of an alignment blade or pin on the canopy to frame. Air pressure on the canopy could cause the locks to press in and out of registration. I fixed mine by just adding a small piece of G-10 to the frame just inside of the locking pin. See the photo. One top slot is done, the bottom slot isn't yet, see the large room for movement.
I am planning to add pilots. I'm going to adapt a couple of the 1/6 pilots to fit, I think.
David S