The close sewn hinge is a figure 8 hinge laterally compressed. You make slits in the stab and elevator, also notch the leading edge of the elevator to clear the hinge at the centerline. Do put clamps on the pieces to hold them in place, or you can pull them out of line while sewing. I use dental floss and a needle to sew with. I start by poking the needle through one slit and running it back through the centerline and through the tied end of the dental floss loop. I pull it tight and put a tiny drop of CA on the floss to hold it in place, and then cut the loop knot off. Then sew away in a figure 8 fashion with the crossover at the hinge centerline. Be neat, pull everything tight, and, when finished, use a drop of CA to fix the end, then cut off the excess. I generally fill the slits with Sigment. I've used these hinges on up to 40 size CL airplanes and never had a failure. If one starts to fail, you could see it, I suppose, and replace it.