I decided to use standard type clevises on the elevator linkage. I would normally have chosen a little longer servo arm but they are not available for this particular servo. I planned to use an aluminum arm and ball links but the aluminum arms from MKS for this servo at least are a sloppy fit. I couldn't reliably get rid of the play. The Nylon horn that comes with the servo is not very heavy duty so I was worried about it twisting with the side loads of a ball link.