Swager,

Is this for your 4*40?

Sullivan Flex Rods (braided cable) are very nice where you can use them; they have the flexibility of the gold-n-rods but don't grow or shrink like the plastics. The Sullivan gold metal connectors or their ball link system with the spring lock works really well (use a lock washer on the ball connector) which I find extremely handy for throttle linkage.

I've also used a Dubro connecter that is black plastic, but the little rods on the end are steel (not sure what they're called)-- they are excellent and don't have the play in the servo arm that the all-metal connectors sometimes have. Very smooth.