Thread hinges can be the freest and have absolute minimum gap between fixed and moving surfaces. They are not particularly 'pretty,' tho.
The kind I refer are actually thread, sewn through holes punched by the sewing needle. These are also called 'figure-eight' hinges. because the thread travel forms a Figure-8.
Example: stab to elevator, wood sheet surfaces: thread the needle with heavy button thread. Between 1/4" and 1/2" from the hinge gap, push the needle through, say, the stabilizer, from bottom to top. Pull enough thread through so you can lead the needle over to the hinge gap and pass the needle down through it. Go about the same distance from the hinge gap onto the elevator and push it up and through. Continue this pattern of over-and-under "stitching" separated about 1/8" until you have say 6 or so passes through the wood. The surfaces should be in contact at the gap line and the thread pulled firmly taut. NOT too tight, but snug so the surfaces stay in line. Snip off the thread where it comes out. A drop of CyA, or even model cement on the pierced holes and the end will keep things honest. Button thread shouldn't become brittle even after doping over it. These do last. They strengthen the surfaces they're on.
Sew another sequence a few inches away. You don't need more than two or three such hinges on each side from center.
Last edited by Lou Crane; 01-15-2018 at 01:22 PM.