They keep coming undone! I tightened them coz i was getting a knocking noise, which solved it, now the noise is slowly returning. The joints are new, as are the nuts and bolts, but the nyloc-ing bit isn't doing it's job. Does anyone know the torque required to tighten these? I'm going to buy new nyloc nuts and bolts in case the ones that come with the joints have an issue, and use threadlock too, hopefully tightening to the right torque will solve it.