David,

Have a quick look at my Thread, BVM T-33 build.

The T-33 has speed brake doors on the bottom of the fuz. It is hard to see in the pictures how it works but I will try and explain it.

Glued to the fuz is a basswood block about 1/2" by an 1". (Bear in mind there are two speed brake doors parallel to each other, so this is repeated on each side!).

On each side of the block is a small carbon arm glued and screwed to the side, that at the hinge end features an additional bit of carbon in a semi circle on top of the carbon arm, to give it a bit more meat. In the middle of the circle is a small hole.

Another carbon arm with a small "dog leg" also has this semi circle at the hinge end. The dog leg is close to the hinge so that as the brake opens, it does not foul the bottom of the fuz. The rest of the length of the arm is bonded to the speed brake door using a very high quality epoxy (aeropoxy in my case).

Two collets are used on a pin that goes through the two holes in the ends of the carbon arms, sandwiching that arms together.

Maybe less than a 1/3 of the way down on the arm with the dog leg, is yet again a semi circle with a hole through on the carbon arm (it is part of the arm, they are all moulded like this). This attaches to the air cylinder arm which in turn is mounted to a former immediately behind the basswood block.

Works quite well!!!

If that does not make sense or you can't visualise it let me know and i will see if I can draw it out for you or similar.

Regards,

Gazzer