RE: Building the Mick Reeves Hawker Hunter
Airbrake - per the kit, this was another of the clear plastic parts.. I elected to make one up from wood - the moving part being a couple of lite-ply formers, with a 1/16" balsa skin and then glassed. For hte hinge, I decided to make up some aluminium brackets and use a music wire hinge pin, which you may be able to make out in these pics.
For the actuator, I made up a horn from 3 laminations of G10, and cut a slit in the belly for the horn to go through. A small former was added to the fuselage inside, both to anchor the aluminium hinge tabs and to ensure that the fuelage held its shape properly for the best possible hinging action. Since the hinge pin is removable, but I obviously don't want it coming out unsolicited, I simply built a fixed fairing in such a way that the fairing captures the pin and the wheel collars that anchor the pin. The fairing can be removed from the fus via 3 small screws.
As usual, I lost some of the pics that I took, but these may be sufficient to explain what I did...