I gave up on everything but the (Great Planes?) metal clevises with the included spring clip retainers for the horn end, and the quick links with the STAINLESS STEEL socket head BOLTS (rather than those crummy set screws) at the servo. Adjustments are a snap, and I've never had one let go. The only place I'll use non-metalic clevises is at the throttle arm, though only if I'm out of ball links...