I've decided to install return springs on the rudder pedals to apply some gentle tension to the rudder cables and avoid the pedals falling forward. These were installed by welding small loops of 1/8" steel rod to the front of the rudder lever arms and the firewall sides. The springs are the ACS 4-1/2" rudder return springs originally intended for the Vari-eze.
The cables were then fabricated using 1/8" cable and nico-press fittings. These were attached to the rudder lever arms using 4 short lengths of 0.050" 4130 plate drilled for 3/16" bolts. The same approach will be used at the rear of the aircraft to attach to the rudder with the spacing of the holes in the plates drilled to exactly centre both the rudder pedals and rudder