Tazio My 1985 Super Sprint was sold 10 years ago, but I do recall it having two arms to connect both gear-levers, hence my post #2. I am pretty sure they needed lubrication occasionally, which prevented the gear change getting stiff.
JV as i said, this is as it was built by CC in '84, so one must presume in use it was proven not to be that effective, and the Nearns must have carried out a little development, must admit it doesn't feel positive in it's action. I've dropped Chris Mintoft the question.
And I'd found all the hardware as a fallback position and make from scratch - wickes and ebay ;-)
Crude but effective. If you remade it with two pieces of polished alloy preferably with lightening holes and wider in middle than at the ends, so they look engineered rather than knocked up and tidy up the bolts, it should feel more precise, look much better and be lighter
My old '88 car had bars either side, never any problems with the gear change, worked a treat.
I had this set up on my first '88 car and recall it having the two arms as mentioned and it being to save the reach as Steve says but also to move the gearlever from under the dash and skinning your knuckles. It was a neat and simple arrangement and most likely came from Arch if Chris cannot get it sorted. I suppose its not a normal consumable that ever needs replacing or refurbishing.
A Type 9 will sort your problem....
he can have your Scandinavian freeby :-)
Think my godson will have something to say about that....