The gear change tower was in fairly good condition.  I had to replace the packing where the rods exit the mount.  The linkages were all in good condition but the packing gone.  
 
  
  
  
I was fortunate that I did not have to make the holes in the linkages round again, they were all ok. All I had to do was just fit new bolts throughout the linkages. the red knob is just temporary.  I had to replace the locating pin on the lever as it was worn a bit and the lever moved to much in a circular way.
Rick.