I have just opened for the first time an original double boxed Valoy II from around 30-40 years ago. Blueish gray. All glass, metal, paint, column plating, and wood are perfect. Rubber has crumbled. Their packing paper has seen better days but no harm done. I cannot figure out how to disassemble the top section to remove and replace the wiring. In the photo, removing the ring and screw indicated in blue are no help, though it does free up the lamp for positioning. Afraid to twist things with too much torque. Any suggestions much appreciated by a new member here. Confess that the pictures are taken with iPad for expediency and of course regret that... more appropriate equipment is on hand.