An update to the S-21 recently became available, rear rudder return cable. (Rear return cable, not rear rudder) This will prevent excess tension on the rudder cables if pressure is applied to both rudder pedals. I was waiting on the kit to arrive when I started on the panel work. Removed forward return cable pulley as it will now have an adjustable (for tension) support going through the firewall. Rear pulley mount was pretty tight quarters with the control sticks installed, but I did make it all work. Stainless steel rivets through floor and lower belly skin. There will be a cover over this whole assembly when interior is finished.