Was able to fabricate a tool to allow removal of the collar. This allowed removal of the aluminum cage, which in turn, allowed removal of the control tube.
With the parts removed from the fuselage, I was able to give them a lacquer thinner bath and a gentle scrubbing to clean off all the grease, dirt, and grime. As always, the parts underneath the dirt are beautiful pieces of work. Some of the steel pieces had some light surface rust. Gave them a bath in a rust remover and then a full cleaning and surface prep. Scrubbed the control tube and repainted it. Cleaned and re-greased all the bearings and reinstalled them into the cage.
Temporarily installed the freshly cleaned and lubed torque linkages to the control tube. Discovered that the custom bolts that connect the torque linkages to the control tube are very slightly different sized, by 0.009 of an inch. This difference establishes an upper and a lower bolt, and it establishes a left and a right hand torque linkage by their corresponding mounting holes. Well done Dalotel.