Originally Posted by Andy_K

I should probably mention that you can't do this with the off-the-shelf Gevenalle levers. They're compatible with a lot of shifters, but not the Campy bar ends (which is what I've got here). You'll notice in the last picture that the connecting widget has the old company name, Retroshift. I was able to acquire an old prototype. Because of the large radius of the left shifter the cable exit hole had to be drilled at a different angle to make this work.