Are your hatches dropping/falling?

We have recently added the Friction hinge sets for Cristal series & Evolution series Portlights and hatches.  

First off, the simple fix is -

Have you tried tightening the Allen head bolt and Nylon nut within the hinge.

If they are still falling or not holding in place, the rudder has cracked, gone hard or missing.  You will need one of the two friction hinge sets - Large or Small