Regulator screws

[David.H]

I could imagine that a left handed screw extractor (which, I should make my position clear, are the work of the devil) would tend to expand a brass grub screw and push out the sides of the terminal. I don't think I would be tempted to try that route...

You're right Hugh - any tool more misnamed than an "Eaziout" would be impossible to find!

Better off to progressively drill out the screw - preferably off the car and in a drill stand - until it frees itself.

I will try a little local heat and if that fails pursue the drill route (which, of course, means there is no drive to unscrew it with....) Hours of harmless fun! Now I know why all the "accessories" (trafficators etc were wired into the back of the dash panel in a big bundle into one terminal) The P.O. couldn't undo it either!