Ahhh. Brilliant Marc. I hereby annoit thee 'Chief Discovery 2 door fixer dude'....
I'll try this adjustment tomorrow.
Thanks mate. I wonder now if the original was really stuffed?
Any idea what could cause that black clip to slide along the rod - I can imagine it's possible if there was an amount of force applied to the mechanism AND the rod was immovable/stuck but I don't think that was what happened in my scenario.

