The rudder cables were - as you said straight forward. Elevator I am still working on, but I had a breakthrough when a friend sent me some pictures of the inside of his machine. Some angled pulleys has made for a neat system, so I will try to replicate that. He also had an issue with the aileron cables. As he moved the stick fore and aft the ailerons moved as the cable was tensioned. Both ailerons going up or down together. He has solved that by routing the cable from the bottom of the stick through the torque tube (picture attached).
I am going for steam gauges, simple, reliable.