If you have any questions about the servo, send it to futaba to be checked. They are good and quick. Takes all the worry out. I use yellow connectors to lock the extension to the ail servo. I think they are sullivan or rocket city. Can't remember.

EZ connectors, a huge no no. Have seen too many come loose. Use a Z bend or a positive lock that can not come off. Not worth risking a plane or someone that it might hit.